fix(gradle-library): attempt to fix condition for fetch depth

.github/workflows/gradle-library.yml

@@ -87,7 +87,7 @@ jobs:
           # (because the @semantic-release/git attempts to use them but needs permissions to bypass protection)
           persist-credentials: false
           # fetch-depth 0 is required to fetch all tags (and to determine the version based on tags)
-          fetch-depth: ${{ inputs.publish-tasks != '' && 0 || 1 }}
+          fetch-depth: ${{ inputs.publish-tasks != '' && '0' || '1' }}
 
       #
       # Build, test and create Docker image