1.3.x: Bump org.slf4j:slf4j-simple in the maven-dev-deps group (#496)

Bumps the maven-dev-deps group with 1 update: org.slf4j:slf4j-simple.


Updates `org.slf4j:slf4j-simple` from 2.0.19 to 2.0.20

---
updated-dependencies:
- dependency-name: org.slf4j:slf4j-simple
  dependency-version: 2.0.20
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: maven-dev-deps
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -29,7 +29,7 @@
 
     <jruby.maven.plugins.version>3.0.6</jruby.maven.plugins.version>
     <gem.home>${project.build.directory}/rubygems</gem.home>
-    <slf4j.version>2.0.19</slf4j.version>
+    <slf4j.version>2.0.20</slf4j.version>
     <log4j.version>2.26.1</log4j.version>
     <spring.version>5.3.39</spring.version>
   </properties>