Update action.yml

.github/actions/libx264/action.yml

@@ -20,7 +20,7 @@ runs:
     uses: actions/checkout@v3
     with:
       repository: mirror/x264
-      ref: master
+      ref: stable
       path: x264
   - name: Check cache
     id: libx264-cache
@@ -48,4 +48,4 @@ runs:
     uses: actions/upload-artifact@v2
     with:
       name: libx264-${{ inputs.env }}-${{ inputs.config }}
-      path: dist/libx264.tgz
+      path: dist/libx264.tgz