Bump docker/setup-buildx-action from 1 to 2 (#14015)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: David Robertson <davidr@element.io>

.github/workflows/docker.yml

@@ -23,7 +23,7 @@ jobs:
 
       - name: Set up Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
 
       - name: Inspect builder
         run: docker buildx inspect

.github/workflows/release-artifacts.yml

@@ -55,7 +55,7 @@ jobs:
 
       - name: Set up Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
         with:
           install: true
 

changelog.d/14015.misc

@@ -0,0 +1 @@
+Bump docker/setup-buildx-action from 1 to 2.