Update gradle/wrapper-validation-action digest to 26ffd68

Author: renovate[bot]

.github/workflows/maven-publish.yml

@@ -21,7 +21,7 @@ jobs:
           tag: ${{ github.event.release.tag_name }}
           generateReleaseNotes: true
       - name: Validate Gradle wrapper
-        uses: gradle/wrapper-validation-action@216d1ad2b3710bf005dc39237337b9673fd8fcd5
+        uses: gradle/wrapper-validation-action@26ffd686eccbbcbf168186b5363c8ee8edbe39f6
       - name: Set up Java for publishing to Maven Central Repository
         uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9 # v4
         with: