trivial: link to countDocuments and estimatedDocumentCount

Author: kay-kim

source/release-notes/4.0.txt

@@ -28,9 +28,9 @@ Issues fixed:
 
 - :issue:`SERVER-19815`: Make repair more robust with the WiredTiger storage engine
 
-- :issue:`SERVER-35989`: ``countDocuments()`` and ``estimatedDocumentCount()`` helpers
+- :issue:`SERVER-35989`: :method:`db.collection.countDocuments()` and :method:`db.collection.estimatedDocumentCount()` helpers
 
-- :issue:`SERVER-36982`: Reintroduce enableMajorityReadConcern:false server parameter
+- :issue:`SERVER-36982`: Reintroduce ``enableMajorityReadConcern:false`` server parameter
 
 - `All JIRA issues closed in 4.0.3
   <https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%274.0.3%27>`_