Bump mpizenberg/elm-tooling-action from 1.5 to 1.6

Bumps [mpizenberg/elm-tooling-action](https://github.com/mpizenberg/elm-tooling-action) from 1.5 to 1.6.
- [Release notes](https://github.com/mpizenberg/elm-tooling-action/releases)
- [Commits](mpizenberg/elm-tooling-action@v1.5...v1.6)

---
updated-dependencies:
- dependency-name: mpizenberg/elm-tooling-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/main.yml

@@ -12,7 +12,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install Elm tools and cache $ELM_HOME
-        uses: mpizenberg/elm-tooling-action@v1.5
+        uses: mpizenberg/elm-tooling-action@v1.6
         with:
           cache-key: elm-tooling.json