Fix typo in caching.md (#4310)

Co-authored-by: Jeremy Stretch <jeremy.stretch@networktocode.com>

docs/additional-features/caching.md

@@ -3,7 +3,7 @@
 To improve performance, NetBox supports caching for most object and list views. Caching is implemented using Redis,
 and [django-cacheops](https://github.com/Suor/django-cacheops)
 
-Several management commands are avaliable for administrators to manaully invalidate cache entries in extenuating circumstances.
+Several management commands are avaliable for administrators to manually invalidate cache entries in extenuating circumstances.
 
 To invalidate a specifc model instance (for example a Device with ID 34):
 ```