Update 2.52.md

Author: valentijnscholten

docs/content/en/open_source/upgrading/2.52.md

@@ -62,5 +62,5 @@ The following Helm chart values have been modified in this release:
 
 There are other instructions for upgrading to 2.52.x. Check the [Release Notes](https://github.com/DefectDojo/django-DefectDojo/releases/tag/2.52.0) for the contents of the release.
 
-## Releas notes
-Check the [Release Notes](https://github.com/DefectDojo/django-DefectDojo/releases/tag/2.52.0) for the contents of the release.
+## Release notes
+Check the [Release Notes](https://github.com/DefectDojo/django-DefectDojo/releases/tag/2.52.0) for the contents of the release.