[deps]: Update LaunchDarkly.ServerSdk to 8.12.0 (#276)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

extensions/Bitwarden.Server.Sdk.Features/src/Bitwarden.Server.Sdk.Features.csproj

@@ -18,7 +18,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="LaunchDarkly.ServerSdk" Version="8.11.0" />
+    <PackageReference Include="LaunchDarkly.ServerSdk" Version="8.12.0" />
   </ItemGroup>
 
   <ItemGroup>