build: use multiline shell script for plugin publishing

Signed-off-by: skhokhlov <[email protected]>

Author: skhokhlov

.github/workflows/ci-publish.yaml

@@ -39,6 +39,6 @@ jobs:
 
       - name: Publish to Gradle portal
         run: |-
-            ./gradlew publishPlugin
-            -Pgradle.publish.key=${{ secrets.GRADLE_PUBLISH_KEY }}
+            ./gradlew publishPlugin \
+            -Pgradle.publish.key=${{ secrets.GRADLE_PUBLISH_KEY }} \
             -Pgradle.publish.secret=${{ secrets.GRADLE_PUBLISH_SECRET }}