Bump org.jenkins-ci.plugins:email-ext in /bom-weekly

Bumps [org.jenkins-ci.plugins:email-ext](https://github.com/jenkinsci/email-ext-plugin) from 1844.v3ea_a_b_842374a_ to 1849.v6dd03b_f6e423.
- [Release notes](https://github.com/jenkinsci/email-ext-plugin/releases)
- [Changelog](https://github.com/jenkinsci/email-ext-plugin/blob/master/CHANGELOG.adoc)
- [Commits](https://github.com/jenkinsci/email-ext-plugin/commits)

---
updated-dependencies:
- dependency-name: org.jenkins-ci.plugins:email-ext
  dependency-type: direct:production
...

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

bom-weekly/pom.xml

@@ -745,7 +745,7 @@
       <dependency>
         <groupId>org.jenkins-ci.plugins</groupId>
         <artifactId>email-ext</artifactId>
-        <version>1844.v3ea_a_b_842374a_</version>
+        <version>1849.v6dd03b_f6e423</version>
       </dependency>
       <dependency>
         <groupId>org.jenkins-ci.plugins</groupId>