chore: update GitHub Actions to use checkout@v4 and setup-dotnet@v4

Author: thomasduft

.github/workflows/build.yml

@@ -10,9 +10,9 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Setup .NET
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: 9.0.x
     - name: Test

.github/workflows/deploy.yml

@@ -9,15 +9,15 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set env
       run: |
         RELEASE_VERSION=${GITHUB_REF#refs/*/}
         echo "RELEASE_VERSION=${RELEASE_VERSION:1}" >> $GITHUB_ENV
     - name: Echo RELEASE_VERSION
       run: echo $RELEASE_VERSION
     - name: Setup .NET
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: 9.0.x
     - name: Pack