Bump mymindstorm/setup-emsdk from 15 to 16

Bumps [mymindstorm/setup-emsdk](https://github.com/mymindstorm/setup-emsdk) from 15 to 16.
- [Release notes](https://github.com/mymindstorm/setup-emsdk/releases)
- [Commits](emscripten-core/setup-emsdk@v15...v16)

---
updated-dependencies:
- dependency-name: mymindstorm/setup-emsdk
  dependency-version: '16'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/on_PR_meson.yaml

@@ -242,7 +242,7 @@ jobs:
         run: |
           sudo apt install -y meson
       - name: Emscripten
-        uses: mymindstorm/setup-emsdk@v15
+        uses: mymindstorm/setup-emsdk@v16
       - name: Compile
         run: |
           meson setup "${{github.workspace}}/build" --cross-file="${{github.workspace}}/em.txt" --wrap-mode=forcefallback -Ddefault_library=static -Dwarning_level=3 -DunitTests=disabled -Dcurl=disabled