ci: Pin buildx action version to fix release workflow (argoproj#10471)

Signed-off-by: Yuan Tang <[email protected]>

Author: terrytangyuan

.github/workflows/release.yaml

@@ -34,6 +34,8 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
+        with:
+          version: v0.9.1
 
       - name: Cache Docker layers
         uses: actions/cache@v3
@@ -107,6 +109,8 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
+        with:
+          version: v0.9.1
 
       - name: Cache Docker layers
         uses: actions/cache@v3