CI: Update mymindstorm/setup-emsdk to v14, should fix cache folder conflicts

https://github.com/mymindstorm/setup-emsdk/releases/tag/v14

Co-authored-by: Yuri Sizov <yuris@humnom.net>

.github/workflows/web_builds.yml

@@ -40,10 +40,11 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set up Emscripten latest
-        uses: mymindstorm/setup-emsdk@v12
+        uses: mymindstorm/setup-emsdk@v14
         with:
           version: ${{env.EM_VERSION}}
           actions-cache-folder: ${{env.EM_CACHE_FOLDER}}
+          cache-key: emsdk-${{ matrix.cache-name }}-${{env.GODOT_BASE_BRANCH}}-${{github.ref}}-${{github.sha}}
 
       - name: Verify Emscripten setup
         run: |