chore: update dotnet SDKs

Author: nozzlegear

.github/workflows/build-and-test.yml

@@ -34,6 +34,7 @@ jobs:
       with:
         dotnet-version: |
           8.0.x
+          9.0.x
 
     - name: Build and pack
       run: fish .github/scripts/build.fish
@@ -108,6 +109,7 @@ jobs:
       with:
         dotnet-version: |
           8.0.x
+          9.0.x
 
     - name: Checkout branch
       uses: actions/checkout@v4
@@ -138,6 +140,7 @@ jobs:
       with:
         dotnet-version: |
           8.0.x
+          9.0.x
 
     - name: Download artifacts
       uses: actions/download-artifact@v4

.github/workflows/release.yml

@@ -34,6 +34,7 @@ jobs:
       with:
         dotnet-version: |
           8.0.x
+          9.0.x
 
     - name: Install dotnet tools
       run: |