fix(publish): quote release tag passed to SignPath

SignPath's GitHub Action parses each parameter value as JSON, so a bare
20.2.0-rc.1 fails with a SyntaxError at position 4. Wrap the value in
double quotes so it's interpreted as a JSON string.

Author: Chirag Aggarwal

.github/workflows/publish.yml

@@ -74,7 +74,7 @@ jobs:
           wait-for-completion: true
           output-artifact-directory: build-signed
           parameters: |
-            version: ${{ github.event.release.tag_name }}
+            version: "${{ github.event.release.tag_name }}"
 
       - name: Replace unsigned Windows binaries
         run: |