ci: enable branch-specific npm publishing (#464)

*Description of changes:*

Add ref parameter to checkout action in npm-publish workflow to use the
target branch specified when creating GitHub releases. This enables
publishing v1.x.x from v1.x branch and v2.x.x from main branch using the
correct source code for each version line.

*Issue #, if available:*
#461

Author: ParidelPooya

.github/workflows/npm-publish.yml

@@ -12,6 +12,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.release.target_commitish }}
       - uses: actions/setup-node@v4
         with:
           node-version: 22