Update README.md

Co-authored-by: Jonas <jonas@freesources.org>
Signed-off-by: Joas Schilling <213943+nickvergessen@users.noreply.github.com>

Author: nickvergessen

README.md

@@ -18,7 +18,7 @@ Some 3rd party libraries that are necessary to run Nextcloud.
 
 ## Testing your PR with server
 
-1. On https://github.com/nextcloud/server make a new branch `3rdaprty/my-dependency`
+1. On https://github.com/nextcloud/server make a new branch `3rdparty/my-dependency`
 2. Navigate into the 3rdparty directory
 3. Checkout the commit sha of the **last commit** of your PR in the 3rdparty repository
 4. Leave the directory