Bump martincostello/update-dotnet-sdk from 3.8.0 to 3.8.1 (#1061)

Author: dependabot[bot]

.github/workflows/update-dotnet-sdks.yml

@@ -21,7 +21,7 @@ permissions:
 jobs:
   update-sdk:
     name: Update .NET SDK
-    uses: martincostello/update-dotnet-sdk/.github/workflows/update-dotnet-sdk.yml@444b0c97f151b01c8d0646ffd0187c4787c17aeb # v3.8.0
+    uses: martincostello/update-dotnet-sdk/.github/workflows/update-dotnet-sdk.yml@e7501ebba8948a456d25ac2ff867af8c8f680454 # v3.8.1
     permissions:
       contents: write
       pull-requests: write