Update signing to use new path

.github/workflows/macos.yml

@@ -45,7 +45,7 @@ jobs:
         if: env.SHOULD_BUILD == 'yes'
         run: |
           if [ -d "VSCode-darwin-${VSCODE_ARCH}" ]; then # just in case the build failed
-            cd VSCode-darwin
+            cd "VSCode-darwin-${VSCODE_ARCH}"
             export CERTIFICATE_P12=VSCodium.p12
             echo $CERTIFICATE_OSX_P12 | base64 --decode > $CERTIFICATE_P12
             export KEYCHAIN=build.keychain