Bump Microsoft.Extensions.Http.Polly from 7.0.14 to 7.0.15 in /src

Bumps [Microsoft.Extensions.Http.Polly](https://github.com/dotnet/aspnetcore) from 7.0.14 to 7.0.15.
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](dotnet/aspnetcore@v7.0.14...v7.0.15)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Http.Polly
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/IoTHub.Portal.Infrastructure/IoTHub.Portal.Infrastructure.csproj

@@ -134,7 +134,7 @@
     </PackageReference>
     <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="7.0.15" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="8.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="7.0.14" />
+    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="7.0.15" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.11" />
     <PackageReference Include="Polly.Extensions.Http" Version="3.0.0" />

src/IoTHub.Portal.Server/IoTHub.Portal.Server.csproj

@@ -60,7 +60,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="7.0.14" />
+    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="7.0.15" />
     <PackageReference Include="Microsoft.Graph" Version="5.38.0" />
     <PackageReference Include="Microsoft.OpenApi" Version="1.6.11" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.19.6" />