more correct syntax for tagged releases (#14)

* more correct syntax

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update publish.yaml

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: pww217

.github/workflows/publish.yaml

@@ -3,12 +3,10 @@ name: Publish
 on:
     # Only on merges into main
     push:
-        branches:
-        -   main
+        tags: v[0-9]+.[0-9]+.[0-9]+
 
 jobs:
     publish:
-        if: startsWith(github.ref, 'refs/tags/v') # Only if tagged
         runs-on: ubuntu-latest
 
         steps: