Bump gradle/actions/wrapper-validation from 6.3.0 to 6.4.0

Bumps [gradle/actions/wrapper-validation](https://github.com/gradle/actions) from 6.3.0 to 6.4.0.
- [Release notes](https://github.com/gradle/actions/releases)
- [Commits](gradle/actions@9c97196...3f5f9ad)

---
updated-dependencies:
- dependency-name: gradle/actions/wrapper-validation
  dependency-version: 6.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -36,7 +36,7 @@ jobs:
           setup_only: true
           token: ${{ secrets.BUF_TOKEN }}
       - name: Validate Gradle Wrapper
-        uses: gradle/actions/wrapper-validation@9c971963bec38e04b3d30dcc455b5382be2fdbfb # v6.3.0
+        uses: gradle/actions/wrapper-validation@3f5f9adaf7d9fecd50b5935e54106014257a94e6 # v6.4.0
       - name: Lint
         run: make lint
       - name: Generate

.github/workflows/conformance.yaml

@@ -36,6 +36,6 @@ jobs:
           setup_only: true
           token: ${{ secrets.BUF_TOKEN }}
       - name: Validate Gradle Wrapper
-        uses: gradle/actions/wrapper-validation@9c971963bec38e04b3d30dcc455b5382be2fdbfb # v6.3.0
+        uses: gradle/actions/wrapper-validation@3f5f9adaf7d9fecd50b5935e54106014257a94e6 # v6.4.0
       - name: Test conformance
         run: make conformance

.github/workflows/release.yaml

@@ -33,7 +33,7 @@ jobs:
           setup_only: true
           token: ${{ secrets.BUF_TOKEN }}
       - name: Validate Gradle Wrapper
-        uses: gradle/actions/wrapper-validation@9c971963bec38e04b3d30dcc455b5382be2fdbfb # v6.3.0
+        uses: gradle/actions/wrapper-validation@3f5f9adaf7d9fecd50b5935e54106014257a94e6 # v6.4.0
       - name: Configure GPG signing & publish
         env:
           GPG_KEY: ${{ secrets.GPG_KEY }}