Bump mpizenberg/elm-tooling-action from 1.5 to 1.6 (#649)

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@913c4c7...809c844)

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

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

.github/workflows/build.yml

@@ -23,7 +23,7 @@ jobs:
           node-version: ${{ matrix.node-version }}
 
       - name: Install elm + tools and cache the ELM_HOME directory
-        uses: mpizenberg/elm-tooling-action@913c4c779e2dbf757453839a6df89917f71d7cf9
+        uses: mpizenberg/elm-tooling-action@809c844d494c95906eb8cafcfa0060b29193709d
         with:
           cache-key: elm-${{ matrix.node-version }}-${{ hashFiles('elm-tooling.json', 'template/elm.json') }}
           cache-restore-key: elm-${{ matrix.node-version }}