ci: Fix tag pattern in release workflow (#40)

Due to YAML parsing, the pattern requires surrounding quotes.
See here for details:
https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#filter-pattern-cheat-sheet

.github/workflows/release.yaml

@@ -2,7 +2,7 @@ name: create-release
 on:
   push:
     tags:
-      - v[0-9]+.[0-9]+.[0-9]+*
+      - 'v[0-9]+.[0-9]+.[0-9]+*'
 jobs:
   create-release:
     runs-on: ubuntu-latest