Update README.md

Author: tianchu

README.md

@@ -14,7 +14,7 @@ Follow the [installation instructions](https://docs.datadoghq.com/serverless/ins
 
 ## Configuration
 
-Follow the [configuration instructions][https://docs.datadoghq.com/serverless/configuration] to tag your telemetry, capture request/response payloads, filter or scrub sensitive information from logs or traces, and more.
+Follow the [configuration instructions](https://docs.datadoghq.com/serverless/configuration) to tag your telemetry, capture request/response payloads, filter or scrub sensitive information from logs or traces, and more.
 
 ## Opening Issues