build(deps): bump org.apache.santuario:xmlsec in /src (#1957)

Bumps org.apache.santuario:xmlsec from 2.2.4 to 2.2.6.

---
updated-dependencies:
- dependency-name: org.apache.santuario:xmlsec
  dependency-type: direct:production
...

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src/common/common-util/build.gradle

@@ -20,7 +20,7 @@ sourceSets {
 
 dependencies {
     //FIXME review dependencies
-    api 'org.apache.santuario:xmlsec:2.2.4'
+    api 'org.apache.santuario:xmlsec:2.2.6'
     api "org.bouncycastle:bcpkix-jdk15on:$bouncyCastleVersion"
     api 'org.apache.commons:commons-lang3:3.12.0'
     api 'commons-io:commons-io:2.13.0'