Update deprecated version of actions/cache

This should fix the build workflow. The version currently listed is
unsupported.

Author: ptomato

.github/workflows/build.yml

@@ -38,7 +38,7 @@ jobs:
     - name: Get SM pkg
       run: ./tools/get_sm.sh
     - name: ccache cache files
-      uses: actions/cache@v1.1.0
+      uses: actions/cache@v4
       with:
         path: ~/.ccache
         key: ${{ runner.os }}-${{ hashFiles('**/mozjs.tar.xz') }}