fix: add discussions to contribution graph (#1957)

Co-authored-by: hubwriter <hubwriter@github.com>

Author: iam-frankqiu

content/github/setting-up-and-managing-your-github-profile/why-are-my-contributions-not-showing-up-on-my-profile.md

@@ -11,9 +11,9 @@ versions:
 
 ### Contributions that are counted
 
-#### Issues and pull requests
+#### Issues, pull requests and discussions
 
-Issues and pull requests will appear on your contribution graph if they were opened in a standalone repository, not a fork.
+Issues, pull requests and discussions will appear on your contribution graph if they were opened in a standalone repository, not a fork.
 
 #### Commits
 Commits will appear on your contributions graph if they meet **all** of the following conditions: