Better phrasing

Author: hynek

.github/SECURITY.md

@@ -2,10 +2,10 @@
 
 ## Supported Versions
 
-We're following [*CalVer*](https://calver.org) with generous backwards-compatibility guarantees.
-Therefore we only support the latest version.
+We're following [Calendar Versioning](https://calver.org) with generous backwards-compatibility guarantees.
+Therefore, we only support the latest version.
 
-That said, you shouldn't be afraid to upgrade if you're only using our documented public APIs and pay attention to `DeprecationWarning`s.
+That said, you shouldn't be afraid to upgrade if you only use our documented public APIs and pay attention to `DeprecationWarning`s.
 Whenever there is a need to break compatibility, it is announced in the changelog and raises a `DeprecationWarning` for a year (if possible) before it's finally really broken.