Fix typo (compatibiltiy vs. compatibility)

Co-authored-by: notquiteamonad <[email protected]>

Author: emilypi

proposals/002-text-utf-default.md

@@ -118,7 +118,7 @@ to make another attempt.
 
 -   Performance satisfies targets listed below in "Performance impact" section.
 
--   Compatibiltiy story satisfies targets listed below in "Compatibility issues" section.
+-   Compatibility story satisfies targets listed below in "Compatibility issues" section.
 
 # People
 
@@ -370,4 +370,4 @@ packages that go out of date.
     -   Recommendation: we must set expectations early and often throughout the implementation process. We expect there to be
         improvements to performance \*on the margins\*.
 
-    -   Note: We have made this argument, and the appetite for change did not shift, but it is still important to track.
+    -   Note: We have made this argument, and the appetite for change did not shift, but it is still important to track.