Bump benc-uk/workflow-dispatch from 1.2.2 to 1.2.3 (#2363)

Bumps [benc-uk/workflow-dispatch](https://github.com/benc-uk/workflow-dispatch) from 1.2.2 to 1.2.3.
- [Release notes](https://github.com/benc-uk/workflow-dispatch/releases)
- [Commits](benc-uk/workflow-dispatch@v1.2.2...v1.2.3)

---
updated-dependencies:
- dependency-name: benc-uk/workflow-dispatch
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/testing.yml

@@ -59,7 +59,7 @@ jobs:
       # scheduled tests should just check that new dependency versions do not break the
       # tests, but should not update the image.
       if: ${{ inputs.event_name == 'push' && env.triggerdockerbuild == 'yes' && inputs.xdist == 'no' }}
-      uses: benc-uk/workflow-dispatch@v1.2.2
+      uses: benc-uk/workflow-dispatch@v1.2.3
       with:
         workflow: Update Image testing-${{ inputs.branch_name }}
         repo: Open-MSS/dockertesting