chore: update workflows

Author: ikesnowy

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
-    container: mcr.microsoft.com/dotnet/sdk:7.0
+    container: mcr.microsoft.com/dotnet/sdk:8.0
 
     steps:
     - name: Checkout

.github/workflows/pack.yml

@@ -11,9 +11,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-dotnet@v3.0.3
+      - uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: '7'
+          dotnet-version: '8'
       - name: Nuget Push
         env:
           nuget_key: ${{ secrets.NUGETAPIKEY }}