Update README.md

Co-Authored-By: Cameron Johnston <cameron@rootdown.net>

README.md

@@ -6,7 +6,7 @@
 - [Configuration](#configuration)
   - [Sensu Go](#sensu-go)
     - [Asset manifest](#asset-manifest)
-    - [Check manifest(s)](#check-manifests)
+    - [Check definition(s)](#check-definitions)
   - [Sensu Core](#sensu-core)
     - [Check definition](#check-definition)
     - [Handler definition](#handler-definition)
@@ -188,4 +188,4 @@ go build -o /usr/local/bin/sensu-prometheus-collector main.go
 If you'd like to contribute to this plugin, see https://github.com/sensu/sensu-go/blob/master/CONTRIBUTING.md
 
 [1]: https://github.com/sensu/sensu-prometheus-collector/releases
-[2]: #asset-registration
+[2]: #asset-registration