Bump martincostello/update-dotnet-sdk from 3.8.2 to 3.8.3

Bumps [martincostello/update-dotnet-sdk](https://github.com/martincostello/update-dotnet-sdk) from 3.8.2 to 3.8.3.
- [Release notes](https://github.com/martincostello/update-dotnet-sdk/releases)
- [Commits](martincostello/update-dotnet-sdk@ee0555f...a56c6d7)

---
updated-dependencies:
- dependency-name: martincostello/update-dotnet-sdk
  dependency-version: 3.8.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

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

@@ -19,7 +19,7 @@ permissions: {}
 jobs:
   update-sdk:
     name: Update .NET SDK
-    uses: martincostello/update-dotnet-sdk/.github/workflows/update-dotnet-sdk.yml@ee0555fe74ccf33a1d2f0a18e0acc0b190914d33 # v3.8.2
+    uses: martincostello/update-dotnet-sdk/.github/workflows/update-dotnet-sdk.yml@a56c6d7f553ce7cacfaae732159694894268742c # v3.8.3
     permissions:
       contents: write
       pull-requests: write