Prepare v0.2.1 release

- update release workflow to actions/checkout@v6
- fix release packaging step to run build-release.ps1
- make release workflow reusable when a GitHub release already exists
- bump extension version to 0.2.1
- add changelog entries for v0.2.1

Author: Grim1313

.github/workflows/release.yml

@@ -14,18 +14,29 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Build release archive
         id: build
         shell: pwsh
         run: |
-          $archivePath = ./scripts/build-release.ps1
+          $archivePath = pwsh -File ./scripts/build-release.ps1
+          if (-not $archivePath) {
+            throw "build-release.ps1 did not return an archive path"
+          }
           "archive_path=$archivePath" >> $env:GITHUB_OUTPUT
 
-      - name: Create GitHub release
+      - name: Create or update GitHub release
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         shell: pwsh
         run: |
-          gh release create $env:GITHUB_REF_NAME "${{ steps.build.outputs.archive_path }}" --title "Steam Promo Watch $env:GITHUB_REF_NAME" --generate-notes
+          $tag = $env:GITHUB_REF_NAME
+          $archivePath = "${{ steps.build.outputs.archive_path }}"
+
+          gh release view $tag *> $null
+          if ($LASTEXITCODE -eq 0) {
+            gh release upload $tag $archivePath --clobber
+          } else {
+            gh release create $tag $archivePath --title "Steam Promo Watch $tag" --generate-notes
+          }

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.2.1
+
+### What's new
+
+- Updated the GitHub Actions release workflow to use `actions/checkout@v6`, which is compatible with Node 24.
+- Fixed the release workflow so it actually runs the packaging script and captures the generated archive path.
+- Made the release workflow idempotent: if a GitHub release already exists for the tag, the workflow now uploads or replaces the asset instead of failing.
+
 ## 0.2.0
 
 ### What's new

manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 3,
   "name": "Steam Promo Watch",
   "description": "Tracks new Steam free-to-keep promotions and notifies you about new giveaways.",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "minimum_chrome_version": "120",
   "permissions": [
     "alarms",