chore(deps): bump org.apache.groovy:groovy-bom from 4.0.20 to 4.0.21

Bumps [org.apache.groovy:groovy-bom](https://github.com/apache/groovy) from 4.0.20 to 4.0.21.
- [Commits](https://github.com/apache/groovy/commits)

---
updated-dependencies:
- dependency-name: org.apache.groovy:groovy-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

examples/slf4j/build.gradle

@@ -23,7 +23,7 @@ dependencies {
     implementation 'org.slf4j:slf4j-api'
 
     testImplementation platform(project(':dependencies'))
-    testImplementation platform('org.apache.groovy:groovy-bom:4.0.20')
+    testImplementation platform('org.apache.groovy:groovy-bom:4.0.21')
     testImplementation platform('org.spockframework:spock-bom:2.3-groovy-4.0')
     testImplementation project(':spock-outputcapture')
     testImplementation 'org.slf4j:slf4j-simple'
@@ -72,7 +72,7 @@ dependencies {
     spock22groovy30Implementation 'org.spockframework:spock-core'
 
     spock22groovy40Implementation platform(project(':dependencies'))
-    spock22groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.20')
+    spock22groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.21')
     spock22groovy40Implementation platform('org.spockframework:spock-bom:2.2-groovy-4.0')
     spock22groovy40Implementation project(':spock-outputcapture')
     spock22groovy40Implementation 'org.slf4j:slf4j-simple'
@@ -93,7 +93,7 @@ dependencies {
     spock23groovy30Implementation 'org.spockframework:spock-core'
 
     spock23groovy40Implementation platform(project(':dependencies'))
-    spock23groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.20')
+    spock23groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.21')
     spock23groovy40Implementation platform('org.spockframework:spock-bom:2.3-groovy-4.0')
     spock23groovy40Implementation project(':spock-outputcapture')
     spock23groovy40Implementation 'org.slf4j:slf4j-simple'
@@ -114,7 +114,7 @@ dependencies {
     spock24groovy30Implementation 'org.spockframework:spock-core'
 
     spock24groovy40Implementation platform(project(':dependencies'))
-    spock24groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.20')
+    spock24groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.21')
     spock24groovy40Implementation platform('org.spockframework:spock-bom:2.4-M2-groovy-4.0')
     spock24groovy40Implementation project(':spock-outputcapture')
     spock24groovy40Implementation 'org.slf4j:slf4j-simple'

examples/springboot/build.gradle

@@ -85,7 +85,7 @@ dependencies {
     spock22groovy30Implementation 'org.springframework.boot:spring-boot-starter-test'
 
     spock22groovy40Implementation platform('org.springframework.boot:spring-boot-dependencies:2.7.1')
-    spock22groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.20')
+    spock22groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.21')
     spock22groovy40Implementation platform('org.spockframework:spock-bom:2.2-groovy-4.0')
     spock22groovy40Implementation project(':spock-outputcapture')
     spock22groovy40Implementation 'org.spockframework:spock-spring'
@@ -108,7 +108,7 @@ dependencies {
     spock23groovy30Implementation 'org.springframework.boot:spring-boot-starter-test'
 
     spock23groovy40Implementation platform('org.springframework.boot:spring-boot-dependencies:2.7.1')
-    spock23groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.20')
+    spock23groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.21')
     spock23groovy40Implementation platform('org.spockframework:spock-bom:2.3-groovy-4.0')
     spock23groovy40Implementation project(':spock-outputcapture')
     spock23groovy40Implementation 'org.spockframework:spock-spring'
@@ -131,7 +131,7 @@ dependencies {
     spock24groovy30Implementation 'org.springframework.boot:spring-boot-starter-test'
 
     spock24groovy40Implementation platform('org.springframework.boot:spring-boot-dependencies:3.2.3')
-    spock24groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.20')
+    spock24groovy40Implementation platform('org.apache.groovy:groovy-bom:4.0.21')
     spock24groovy40Implementation platform('org.spockframework:spock-bom:2.4-M2-groovy-4.0')
     spock24groovy40Implementation project(':spock-outputcapture')
     spock24groovy40Implementation 'org.spockframework:spock-spring'

spock-outputcapture/build.gradle

@@ -8,7 +8,7 @@ dependencies {
     annotationProcessor 'org.projectlombok:lombok'
 
     compileOnly platform(project(':dependencies'))
-    compileOnly platform('org.apache.groovy:groovy-bom:4.0.20')
+    compileOnly platform('org.apache.groovy:groovy-bom:4.0.21')
     compileOnly platform('org.spockframework:spock-bom:2.3-groovy-4.0')
     compileOnly 'org.projectlombok:lombok'