fix(ci): typo in semver rev check (#2213)

## Description

Typo... Hate that this is not possible to really test before merging.

## Breaking Changes

<!-- Optional, if there are any breaking changes document them,
including how to migrate older code. -->

## Notes & open questions

<!-- Any notes, remarks or open questions you have to make about the PR.
-->

## Change checklist

- [ ] Self-review.
- [ ] Documentation updates if relevant.
- [ ] Tests if relevant.
- [ ] All breaking changes documented.

.github/workflows/ci.yml

@@ -94,7 +94,7 @@ jobs:
         if: ${{ github.event_name == 'push' || github.event_name == 'merge_group' }}
         shell: bash
         run: |
-          echo "HEAD_COMMIT_SHA=$(git rev-parse origin/main" >> ${GITHUB_ENV}
+          echo "HEAD_COMMIT_SHA=$(git rev-parse origin/main)" >> ${GITHUB_ENV}
       - name: Check semver
         # uses: obi1kenobi/cargo-semver-checks-action@v2
         uses: n0-computer/cargo-semver-checks-action@feat-baseline