Update docs/MAINTAINING.md

Co-authored-by: Jonathan Yu <[email protected]>

Author: jsjoeio

docs/MAINTAINING.md

@@ -43,7 +43,7 @@ We use the following process for triaging GitHub issues:
 
 1. a submitter creates an issue
 2. add appropriate labels
-   1. if we need to look further into it, add "needs-investigation"
+   1. if we need to look into it further, add "needs-investigation"
 3. add to milestone
    1. if it should be fixed soon, add to version milestone or "On Deck"
    2. if not urgent, add to "Backlog"