ci: bump mymindstorm/setup-emsdk from 12 to 14

Bumps [mymindstorm/setup-emsdk](https://github.com/mymindstorm/setup-emsdk) from 12 to 14.
- [Release notes](https://github.com/mymindstorm/setup-emsdk/releases)
- [Commits](https://github.com/mymindstorm/setup-emsdk/compare/v12...v14)

---
updated-dependencies:
- dependency-name: mymindstorm/setup-emsdk
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/build.yml

@@ -94,7 +94,7 @@ jobs:
 
     - name: Install Emscripten
       if: ${{ !matrix.cli-only && !matrix.use-cross }}
-      uses: mymindstorm/setup-emsdk@v12
+      uses: mymindstorm/setup-emsdk@v14
       with:
         version: ${{ env.EMSCRIPTEN_VERSION }}