Chore(deps): Bump AWSSDK.EC2 from 3.7.318.1 to 3.7.321.1 in /Source (#2664)

Bumps [AWSSDK.EC2](https://github.com/aws/aws-sdk-net) from 3.7.318.1 to 3.7.321.1.
- [Changelog](https://github.com/aws/aws-sdk-net/blob/main/SDK.CHANGELOG.MD)
- [Commits](https://github.com/aws/aws-sdk-net/commits/3.7.321.1)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Source/NETworkManager/NETworkManager.csproj

@@ -58,7 +58,7 @@
     </ItemGroup>
     <ItemGroup>
         <PackageReference Include="AirspaceFixer" Version="1.0.6" />
-        <PackageReference Include="AWSSDK.EC2" Version="3.7.318.1" />
+        <PackageReference Include="AWSSDK.EC2" Version="3.7.321.1" />
         <PackageReference Include="DnsClient" Version="1.7.0" />
         <PackageReference Include="IPNetwork2" Version="3.0.667" />
         <PackageReference Include="Lextm.SharpSnmpLib" Version="12.5.2" />