Bump hashicorp/vault-action from 2.4.2 to 2.7.3

Bumps [hashicorp/vault-action](https://github.com/hashicorp/vault-action) from 2.4.2 to 2.7.3.
- [Release notes](https://github.com/hashicorp/vault-action/releases)
- [Changelog](https://github.com/hashicorp/vault-action/blob/main/CHANGELOG.md)
- [Commits](hashicorp/vault-action@v2.4.2...v2.7.3)

---
updated-dependencies:
- dependency-name: hashicorp/vault-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Get Dockerhub credentials
-      uses: hashicorp/vault-action@v2.4.2
+      uses: hashicorp/vault-action@v2.7.3
       with:
         url: https://vault.jimdo-platform.net
         method: jwt