chore(deps): update dependency serilog.sinks.file to v7

Author: renovate[bot]

Doppler.HelloMicroservice/Doppler.HelloMicroservice.csproj

@@ -14,7 +14,7 @@
     <PackageReference Include="Serilog.Sinks.Async" Version="1.5.0" />
     <PackageReference Include="Serilog.Sinks.Console" Version="4.1.0" />
     <PackageReference Include="Serilog.Sinks.Debug" Version="2.0.0" />
-    <PackageReference Include="Serilog.Sinks.File" Version="5.0.0" />
+    <PackageReference Include="Serilog.Sinks.File" Version="7.0.0" />
     <PackageReference Include="Serilog.Sinks.Loggly" Version="5.4.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
   </ItemGroup>