Update sdk_generation.yaml

Author: ThomasRooney

.github/workflows/sdk_generation.yaml

@@ -27,6 +27,7 @@ jobs:
             set_version: ${{ github.event.inputs.set_version }}
             speakeasy_version: latest
             target: ${{ github.event.inputs.target }}
+            runs-on: ubuntu-24.04
         secrets:
             github_access_token: ${{ secrets.GITHUB_TOKEN }}
             nuget_api_key: ${{ secrets.NUGET_API_KEY }}