Bump update-dotnet-sdk to v3.1.2 (#4900)

Update martincostello/update-dotnet-sdk to v3.1.2.

.github/workflows/update-sdk.yml

@@ -22,7 +22,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         ref: dev
-    - uses: martincostello/update-dotnet-sdk@b3d5ca8064ec275f7a1d0b9640d28a57ab94090b
+    - uses: martincostello/update-dotnet-sdk@65c5f402b15326dd12d7b1dac63abdbb53ed695c # v3.1.2
       with:
         quality: 'daily'
         repo-token: ${{ secrets.GITHUB_TOKEN }}