Bump Swashbuckle.AspNetCore to 10.2.3

CI builds with -warnaserror, so NU1903 for the transitively
referenced Microsoft.OpenApi 2.4.1 (GHSA-v5pm-xwqc-g5wc, high
severity) failed the build. Swashbuckle.AspNetCore 10.1.7 pins
Microsoft.OpenApi 2.4.1; 10.2.3 pins the patched 2.7.5, staying
within the 2.x line so no API changes are required.

Author: aeshub

api/api.csproj

@@ -47,7 +47,7 @@
     <PackageReference Include="Microsoft.Identity.Web" Version="4.8.0" />
     <PackageReference Include="MQTTnet" Version="4.3.7.1207" />
     <PackageReference Include="MQTTnet.Extensions.ManagedClient" Version="4.3.7.1207" />
-    <PackageReference Include="Swashbuckle.AspNetCore" Version="10.1.7" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="10.2.3" />
     <PackageReference Include="System.Security.Cryptography.Xml" Version="10.0.7" />
     <!-- Pin Kiota.Abstractions to the patched version until Graph updates transitively. -->
     <!--