ci: use github hosted runners for multiarch docker builds

Author: ricky-undeadcoders

.github/workflows/build.yml

@@ -29,11 +29,12 @@ jobs:
     permissions:
       contents: read
       id-token: write
-    uses: grafana/shared-workflows/.github/workflows/docker-build-push-multiarch.yml@cbb5c3f16e9be56e14f5f094978420b09444b414 # main
+    uses: grafana/shared-workflows/.github/workflows/docker-build-push-multiarch.yml@6b59374893555bf476179dfeb96013b80406102f # main
     with:
       platforms: linux/amd64,linux/arm64
       tags: |
         type=ref,event=branch,enable={{is_default_branch}}
         type=semver,pattern={{version}},value=${{ inputs.tag }},enable=${{ inputs.tag != '' }}
       push: ${{ github.event_name == 'push' || github.event_name == 'workflow_call' }}
-      registries: "dockerhub"
+      registries: dockerhub
+      runner-type: github