[Backport 2.x] Update dependency com.diffplug.spotless:spotless-plugi…

…n-gradle to v6.23.0 (#208)

Update dependency com.diffplug.spotless:spotless-plugin-gradle to v6.23.0 (#206)



(cherry picked from commit 70e7926)

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build.gradle

@@ -69,7 +69,7 @@ buildscript {
 
     dependencies {
         classpath "org.opensearch.gradle:build-tools:${opensearch_version}"
-        classpath "com.diffplug.spotless:spotless-plugin-gradle:6.22.0"
+        classpath "com.diffplug.spotless:spotless-plugin-gradle:6.23.0"
         classpath "com.github.form-com.diff-coverage-gradle:diff-coverage:0.9.5"
     }
 }