Bump org.slf4j:slf4j-simple in /testing/testcontainers/java

Bumps org.slf4j:slf4j-simple from 2.0.11 to 2.0.12.

---
updated-dependencies:
- dependency-name: org.slf4j:slf4j-simple
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

testing/testcontainers/java/build.gradle

@@ -23,7 +23,7 @@ dependencies {
     implementation 'org.postgresql:postgresql:42.7.1'
     implementation 'io.crate:crate-jdbc:2.7.0'
     implementation 'org.slf4j:slf4j-api:2.0.12'
-    implementation 'org.slf4j:slf4j-simple:2.0.11'
+    implementation 'org.slf4j:slf4j-simple:2.0.12'
     testImplementation 'junit:junit:4.13.2'
     testImplementation "org.assertj:assertj-core:3.25.3"
     testImplementation 'org.testcontainers:testcontainers:1.19.4'