Bump Akka from 1.5.30 to 1.5.31 in /src/WebApiTemplate

Bumps [Akka](https://github.com/akkadotnet/akka.net) from 1.5.30 to 1.5.31.
- [Release notes](https://github.com/akkadotnet/akka.net/releases)
- [Changelog](https://github.com/akkadotnet/akka.net/blob/dev/RELEASE_NOTES.md)
- [Commits](akkadotnet/akka.net@1.5.30...1.5.31)

---
updated-dependencies:
- dependency-name: Akka
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

src/WebApiTemplate/Directory.Packages.props

@@ -5,7 +5,7 @@
 
   <!-- Akka.NET Package Versions -->
   <ItemGroup>
-    <PackageVersion Include="Akka" Version="1.5.30" />
+    <PackageVersion Include="Akka" Version="1.5.31" />
     <PackageVersion Include="Akka.Cluster.Hosting" Version="1.5.30.1" />
     <PackageVersion Include="Akka.Discovery.Azure" Version="1.5.30" />
     <PackageVersion Include="Akka.HealthCheck.Hosting.Web" Version="1.5.26.1" />