Bump SHA

Bump action SHA to include changes from #599.

Author: martincostello

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

@@ -219,7 +219,7 @@ jobs:
     # for the same release channel as the SDK specified in global.json.
     - name: Update .NET SDK
       id: update-dotnet-sdk
-      uses: martincostello/update-dotnet-sdk@ef5170e2dbee1235ee754f03a6018794c061c8e5 # v2.5.0
+      uses: martincostello/update-dotnet-sdk@29c3c21996806802cd4e8d37cab53609bd1d9c7b # v3.0.0
       with:
         branch-name: ${{ inputs.branch-name }}
         channel: ${{ inputs.channel }}