chore: fix packages workflow

Author: openscript

.changeset/cute-stars-pump.md

@@ -0,0 +1,5 @@
+---
+'@openscript-ch/starlight-theme': patch
+---
+
+Fix packages workflow

.github/workflows/packages.yml

@@ -14,7 +14,7 @@ permissions:
 jobs:
   publish-packages:
     name: Publish packages
-    if: startsWith(github.event.head_commit.message, 'chore: publish new release')
+    if: contains(github.event.head_commit.message, 'publish new release')
     runs-on: ubuntu-latest
     steps:
       - name: Checkout