chore(deps): update docker/setup-buildx-action digest to e468171 (#218)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Alex Boten <[email protected]>

Author: renovate[bot]

.github/workflows/validator-docker.yaml

@@ -47,7 +47,7 @@ jobs:
           type=semver,pattern={{major}},enable=${{ !startsWith(github.ref, 'refs/tags/v0.') }}
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@18ce135bb5112fa8ce4ed6c17ab05699d7f3a5e0 # v3
+      uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3
 
     - name: Copy schema files
       run: make validator-copy-schema