Reduce retention of pull builds

Preventing draft builds will impede testing, but it's best not to keep the artifacts too long

.github/workflows/build.yml

@@ -13,7 +13,6 @@ on:
   pull_request:
     branches:
       - '*'
-    types: [review_requested, ready_for_review]
     paths-ignore:
       - "**/README.md"
       - ".github/ISSUE_TEMPLATE/**"
@@ -112,7 +111,7 @@ jobs:
         with:
           name: IntroSkipper-${{ env.SANITIZED_BRANCH_NAME }}.dll
           path: IntroSkipper/bin/Debug/net8.0/IntroSkipper.dll
-          retention-days: 7
+          retention-days: 3
           if-no-files-found: error
 
       - name: Create archive