Bump AWSSDK.EC2 from 3.7.312.3 to 3.7.315.2

Bumps [AWSSDK.EC2](https://github.com/aws/aws-sdk-net) from 3.7.312.3 to 3.7.315.2.
- [Changelog](https://github.com/aws/aws-sdk-net/blob/main/SDK.CHANGELOG.MD)
- [Commits](https://github.com/aws/aws-sdk-net/commits)

---
updated-dependencies:
- dependency-name: AWSSDK.EC2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

src/discovery/aws/Akka.Discovery.AwsApi/Akka.Discovery.AwsApi.csproj

@@ -11,7 +11,7 @@
     <ItemGroup>
       <PackageReference Include="Akka.Discovery" Version="$(AkkaVersion)" />
       <PackageReference Include="Akka.Hosting" Version="$(AkkaHostingVersion)" />
-      <PackageReference Include="AWSSDK.EC2" Version="3.7.312.3" />
+      <PackageReference Include="AWSSDK.EC2" Version="3.7.315.2" />
       <PackageReference Include="AWSSDK.ECS" Version="3.7.305.16" />
     </ItemGroup>