.github/workflows/ci.yml: fix Emscripten test.

Author: dot-asm

.github/workflows/ci.yml

@@ -264,7 +264,7 @@ jobs:
         registry: https://index.docker.io/v1/
         image: emscripten/emsdk
         options: --volume ${{ github.workspace }}:/blst --network=none
-        run: git clone -q /blst /tmp/blst && /tmp/blst/bindings/emscripten/run.me -O2
+        run: git -c safe.directory="*" clone -q /blst /tmp/blst && /tmp/blst/bindings/emscripten/run.me -O2
 
     - name: C#
       run: |