FINERACT-2181: Pin gradle/actions action to 017a9ef

Author: renovate-bot

.github/workflows/build-documentation.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Congfigure vega-cli
         run: npm i -g vega-cli --unsafe
       - name: Validate Gradle wrapper
-        uses: gradle/actions/wrapper-validation@v4
+        uses: gradle/actions/wrapper-validation@017a9effdb900e5b5b2fddfb590a105619dca3c3 # v4
       - name: Install additional software
         run: |
             sudo apt-get update