Release v0.6.1 and scope workflow write permissions

- Bump package version and changelog to v0.6.1
- Move `contents: write` permission to release job only
- Remove consumed changelog fragment files

.github/workflows/release.yml

@@ -9,9 +9,6 @@ concurrency:
   group: release-${{ github.ref }}
   cancel-in-progress: false
 
-permissions:
-  contents: write
-
 jobs:
   quality-gate:
     runs-on: ubuntu-latest
@@ -244,6 +241,8 @@ jobs:
   release:
     needs: [build-linux, build-macos, build-windows]
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - name: Checkout
         uses: actions/checkout@v4