Update gradle/actions digest to 473878a

Author: renovate[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
-            - uses: gradle/actions/wrapper-validation@16bf8bc8fe830fa669c3c9f914d3eb147c629707 # v4
+            - uses: gradle/actions/wrapper-validation@473878a77f1b98e2b5ac4af93489d1656a80a5ed # v4
 
     build:
         if: "! contains(toJSON(github.event.commits.*.message), '[skip ci]')"