Modernization Phase 2.6: Fix CommitLockTask rootDirPath annotation

Change rootDirPath from @input to @internal since it's a configuration
value (project directory path) used for git commands, not a build input
that affects task outputs

Author: OdysseusLives

src/main/groovy/nebula/plugin/dependencylock/tasks/CommitLockTask.groovy

@@ -55,7 +55,7 @@ abstract class CommitLockTask extends AbstractLockTask {
     @Optional
     abstract Property<Integer> getRemoteRetries()
 
-    @Input
+    @Internal
     abstract Property<String> getRootDirPath()
 
     private final ExecOperations execOperations