setup dotnet 9 for actions

Author: skttl

.github/workflows/build.yml

@@ -9,6 +9,10 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 9.0.x
     - name: Build ImageSharp Package
       run: dotnet build ./src/ImageSharpCommunity.Providers.Remote/ImageSharpCommunity.Providers.Remote.csproj --configuration Release
     - name: Build Umbraco Package

.github/workflows/release-preview.yml

@@ -16,6 +16,10 @@ jobs:
     - name: Cancel job if version is empty
       if: ${{ env.VERSION == '' }}
       run: exit 1
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 9.0.x
     - name: Build ImageSharp Package
       run: dotnet pack ./src/ImageSharpCommunity.Providers.Remote/ImageSharpCommunity.Providers.Remote.csproj /p:NuGetVersion=${VERSION} /p:Version=${VERSION} --output . --configuration Release
     - name: Pack

.github/workflows/release.yml

@@ -16,6 +16,10 @@ jobs:
     - name: Cancel job if version is empty
       if: ${{ env.VERSION == '' }}
       run: exit 1
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 9.0.x
     - name: Build ImageSharp Package
       run: dotnet pack ./src/ImageSharpCommunity.Providers.Remote/ImageSharpCommunity.Providers.Remote.csproj /p:NuGetVersion=${VERSION} /p:Version=${VERSION} --output . --configuration Release
     - name: Pack

.github/workflows/umb-release-preview.yml

@@ -16,6 +16,10 @@ jobs:
     - name: Cancel job if version is empty
       if: ${{ env.VERSION == '' }}
       run: exit 1
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 9.0.x
     - name: Build Umbraco Package
       run: dotnet pack ./src/Umbraco.Community.ImageSharpRemoteImages/Umbraco.Community.ImageSharpRemoteImages.csproj /p:NuGetVersion=${VERSION} /p:Version=${VERSION} --output . --configuration Release
     - name: Pack

.github/workflows/umb-release.yml

@@ -16,6 +16,10 @@ jobs:
     - name: Cancel job if version is empty
       if: ${{ env.VERSION == '' }}
       run: exit 1
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 9.0.x
     - name: Build Umbraco Package
       run: dotnet pack ./src/Umbraco.Community.ImageSharpRemoteImages/Umbraco.Community.ImageSharpRemoteImages.csproj /p:NuGetVersion=${VERSION} /p:Version=${VERSION} --output . --configuration Release
     - name: Pack