chore: Fix wording for master branch (#2622)

It should be for package managers pointing to the master branch,
and not package managers not pointing to the master branch.

Author: philipphofmann

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## 8.0.0
 
-This version adds a dependency on Swift. We renamed the default branch from `master` to `main`. We are going to keep the `master` branch for backwards compatibility for package managers not pointing to the `master` branch.
+This version adds a dependency on Swift. We renamed the default branch from `master` to `main`. We are going to keep the `master` branch for backwards compatibility for package managers pointing to the `master` branch.
 
 ### Features
 

README.md

@@ -22,7 +22,7 @@ This SDK is written in Objective-C but also provides a nice Swift interface.
 
 **Where is the master branch?**
 
-We renamed the default branch from `master` to `main`. We are going to keep the `master` branch for backwards compatibility for package managers not pointing to the [`master` branch](https://github.com/getsentry/sentry-cocoa/tree/master).
+We renamed the default branch from `master` to `main`. We are going to keep the `master` branch for backwards compatibility for package managers pointing to the [`master` branch](https://github.com/getsentry/sentry-cocoa/tree/master).
 
 # Initialization