Fix GitHub actions workflows

- remove unnecessary trigger from PR workflow
- update actions/upload-artifact@v3 to v4
- fix token permissions

.github/workflows/dotnet-main.yml

@@ -72,7 +72,7 @@ jobs:
         branch-threshold: 0                         # Default: 0, which means thresholds are not applied
 
     - name: Upload coverage report artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: Coverage Report
         path: coverage-results/**

.github/workflows/dotnet-pr.yml

@@ -2,14 +2,14 @@
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-net
 name: dotnet-pr
 on:
-  workflow_dispatch:
   pull_request:
     branches: [ "main" ]
 permissions:
   contents: read
-  issues: read
+  issues: write
   checks: write
   pull-requests: write
+  actions: write
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -68,7 +68,7 @@ jobs:
           branch-threshold: 0                         # Default: 0, which means thresholds are not applied
 
       - name: Upload coverage report artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Coverage Report
           path: coverage-results/**