FINERACT-2181: Pin gradle/actions action to 748248d

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@748248ddd2a24f49513d8f472f81c3a07d4d50e1 # v4
       - name: Install additional software
         run: |
             sudo apt-get update