workflow: Fix GitHub Actions CI with latest thirdparty packages

.github/workflows/ci.yml

@@ -97,6 +97,9 @@ jobs:
         mv panda3d-1.10.8/thirdparty thirdparty
         rmdir panda3d-1.10.8
 
+        # Temporary hack so that pzip can run, since we are about to remove Cg anyway.
+        install_name_tool -id "$(pwd)/thirdparty/darwin-libs-a/nvidiacg/lib/libCg.dylib" thirdparty/darwin-libs-a/nvidiacg/lib/libCg.dylib
+
         brew install ccache
 
     - name: Install dependencies (Ubuntu)
@@ -121,7 +124,7 @@ jobs:
       uses: actions/cache@v1
       with:
         path: thirdparty
-        key: ci-cmake-${{ runner.OS }}-thirdparty-v1.10.8-r1
+        key: ci-cmake-${{ runner.OS }}-thirdparty-v1.10.8-r3
     - name: Install dependencies (Windows)
       if: runner.os == 'Windows'
       shell: powershell