Adds C11 standard flag for builds

Try to fix windows build beta CI
Adds the C11 standard flag to the build environment. This ensures
that the code is compiled using the C11 standard, potentially
improving compatibility and avoiding compiler-specific behavior.

.github/workflows/beta-build.yml

@@ -214,6 +214,7 @@ jobs:
         env:
           CI: false
           NODE_OPTIONS: --max-old-space-size=4096
+          CFLAGS: -std:c11
         run: pnpm tauri build ${{ env.BUILD_MODE}} ${{ matrix.os == 'windows-latest' && '-b nsis' || '' }}
 
       - name: Rename macos-aarch64