Pass flint_version_check=False to build backend

Author: agriyakhetarpal

.github/workflows/ci-emscripten.yml

@@ -99,7 +99,7 @@ jobs:
           pkg-config --modversion mpfr
           pkg-config --modversion flint
 
-          pyodide build -Cbuild-dir=flint_wasm_build
+          pyodide build -Cbuild-dir=flint_wasm_build -Csetup-args="-Dflint_version_check=false"
 
       - name: Persist python-flint build directory to cache
         uses: actions/cache/save@d4323d4df104b026a6aa633fdb11d772146be0bf # v4.2.2