Fix must gather publish image (#1222)

Signed-off-by: Ruben Vargas <ruben.vp8510@gmail.com>

Author: rubenvp8510

.github/workflows/reusable-publish-images.yaml

@@ -77,8 +77,8 @@ jobs:
         if: ${{ inputs.publish_bundle }}
         uses: docker/build-push-action@1dc73863535b631f98b2378be8619f83b136f4a0 #v6.17.0
         with:
-          context: ./cmd/gather
-          file: ./Dockerfile
+          context: .
+          file: ./cmd/gather/Dockerfile
           platforms: linux/amd64,linux/arm64,linux/s390x,linux/ppc64le
           push: ${{ inputs.push }}
           tags: ${{ github.repository }}/must-gather:${{ inputs.version_tag }}