release: include payload only in osx-arm64 tarball

Only include the payload (binaries) in the tar.gz archive for osx-arm64.
Previously this was including the parent directory that captured the
payload, pkg, and symbol subdirectories and children.

The osx-x64 tar.gz archive is already correctly only containing the
payload.

Author: mjcheetham

.github/workflows/release.yml

@@ -606,7 +606,7 @@ jobs:
           tar -C macos-osx-x64-artifacts/payload -czf osx-payload-and-symbols/gcm-osx-x64-$version.tar.gz .
           tar -C macos-osx-x64-artifacts/symbols -czf osx-payload-and-symbols/gcm-osx-x64-$version-symbols.tar.gz .
 
-          tar -C macos-osx-arm64-artifacts -czf osx-payload-and-symbols/gcm-osx-arm64-$version.tar.gz .
+          tar -C macos-osx-arm64-artifacts/payload -czf osx-payload-and-symbols/gcm-osx-arm64-$version.tar.gz .
           tar -C macos-osx-arm64-artifacts/symbols -czf osx-payload-and-symbols/gcm-osx-arm64-$version-symbols.tar.gz .
 
       - name: Archive Windows payload and symbols