fix: applied proper generic

Author: dreamorosi

Diff for: packages/tracing/src/Tracer.ts

@@ -264,7 +264,7 @@ class Tracer implements TracerInterface {
         // This is needed because some aws-sdk clients like AWS.DynamoDB.DocumentDB don't comply with the same
         // instrumentation contract like most base clients. 
         // For detailed explanation see: https://github.com/awslabs/aws-lambda-powertools-typescript/issues/524#issuecomment-1024493662
-        this.provider.captureAWSClient((service as unknown as T & { service: T }).service);
+        this.provider.captureAWSClient((service as T & { service: T }).service);
 
         return service;
       } catch {