Updated delete providers command

Signed-off-by: Yash Gupta <[email protected]>

Author: YashxG

content/v1.18/software/uninstall.md

@@ -138,10 +138,10 @@ NAME                   INSTALLED   HEALTHY   PACKAGE
 upbound-provider-aws   True        True      xpkg.upbound.io/upbound/provider-aws:v1.0.0   8h
 ```
 
-Remove the installed _providers_ with `kubectl delete provider`.
+Remove the installed _providers_ with `kubectl delete providers`.
 
 ```shell
-kubectl delete provider upbound-provider-aws
+kubectl delete providers upbound-provider-aws
 ```
 
 ## Uninstall the Crossplane deployment 
@@ -180,4 +180,4 @@ kube-flannel      Active   2m42s
 kube-node-lease   Active   2m47s
 kube-public       Active   2m47s
 kube-system       Active   2m47s
-```
+```