Fix a typo `compatability` → `compatibility`
diff --git a/PROJECTS.md b/PROJECTS.md
index 4f200b7..f3fffb7 100644
--- a/PROJECTS.md
+++ b/PROJECTS.md
@@ -48,7 +48,7 @@ These are good small projects to get started with libgit2.
a new example that mirrors the behavior. Examples don't have to be
perfect emulations, but should demonstrate how to use the libgit2 APIs
to get results that are similar to Git commands. This lets you (and us)
- easily exercise a particular facet of the API and measure compatability
+ easily exercise a particular facet of the API and measure compatibility
and feature parity with core git.
* Submit a PR to clarify documentation! While we do try to document all of
the APIs, your fresh eyes on the documentation will find areas that are