chore: Add matrix value back since the whole job is disabled now (#257)

Author: robin-aws

.github/workflows/ci_test_net.yml

@@ -31,8 +31,7 @@ jobs:
     strategy:
       matrix:
         library: [
-          # Reintroduce once MPL builds with .NET
-          # DynamoDbEncryption,
+          DynamoDbEncryption,
         ]
         dotnet-version: [ '6.0.x' ]
         os: [