Bump Swashbuckle.AspNetCore (#42339)

Bumps the dotnet group in /docs/azure/sdk/snippets/authentication/credential-chains with 1 update: [Swashbuckle.AspNetCore](https://github.com/domaindrivendev/Swashbuckle.AspNetCore).


Updates `Swashbuckle.AspNetCore` from 6.7.1 to 6.7.3
- [Release notes](https://github.com/domaindrivendev/Swashbuckle.AspNetCore/releases)
- [Commits](domaindrivendev/Swashbuckle.AspNetCore@v6.7.1...v6.7.3)

---
updated-dependencies:
- dependency-name: Swashbuckle.AspNetCore
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/azure/sdk/snippets/authentication/credential-chains/AuthenticationSampleApp.csproj

@@ -11,7 +11,7 @@
     <PackageReference Include="Azure.Storage.Blobs" Version="12.21.2" />
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.8" />
     <PackageReference Include="Microsoft.Extensions.Azure" Version="1.7.5" />
-    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.7.1" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.7.3" />
   </ItemGroup>
 
 </Project>