Fixes typo

docs/installation/upgrading.md

@@ -136,7 +136,7 @@ Check out the desired release by specifying its tag. For example:
 ```
 cd /opt/netbox && \
 sudo git fetch && \
-sudo git checkout v2.4.7
+sudo git checkout v4.2.7
 ```
 
 ## 4. Run the Upgrade Script