chore: trigger new tendermintdev/sdk-proto-gen tag (#11743)

## Description

Tags new tendermintdev/sdk-proto-gen version on dockerhub.
---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/main/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

.github/workflows/proto-docker.yml

@@ -19,7 +19,7 @@ jobs:
         id: prep
         run: |
           DOCKER_IMAGE=tendermintdev/sdk-proto-gen
-          VERSION=v0.6 
+          VERSION=latest
           TAGS="${DOCKER_IMAGE}:${VERSION}"
           echo ::set-output name=tags::${TAGS}
 
@@ -41,7 +41,6 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           context: ./contrib/devtools
-          file: ./contrib/devtools/dockerfile
           platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.prep.outputs.tags }}