🌱 add buildx in renovate workflow (#162)

add buildx in renovate workflow

renovate workflow failed because we build image in that workflow and
buildx was missing. buildx is now the default builder of docker and we
cannot build images without that.
This commit adds buildx to the renovate workflow so that when renovate
workflow is run and inside the workflow, if we build docker image then
that shouldn't give us any error.

Signed-off-by: kranurag7 <[email protected]>

Author: kranurag7

.github/workflows/schedule-update-bot.yaml

@@ -32,6 +32,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
 
+      # qemu is not required as of now because we don't build images for arm64
+      # use docker/setup-qemu-action@v3 if you want to have arm64 images.
+      - name: Set up Docker Buildx # required for building image
+        uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3
+
       - name: Generate Token
         uses: actions/create-github-app-token@a0de6af83968303c8c955486bf9739a57d23c7f1 # v1
         id: generate-token