Fix some typos

Signed-off-by: Rui Cao <ruicao@alauda.io>

docs/netcheck.md

@@ -5,7 +5,7 @@ With the ``deploy_netchecker`` var enabled (defaults to false), Kubespray deploy
 Network Checker Application from the 3rd side `l23network/k8s-netchecker` docker
 images. It consists of the server and agents trying to reach the server by usual
 for Kubernetes applications network connectivity meanings. Therefore, this
-automagically verifies a pod to pod connectivity via the cluster IP and checks
+automatically verifies a pod to pod connectivity via the cluster IP and checks
 if DNS resolve is functioning as well.
 
 The checks are run by agents on a periodic basis and cover standard and host network
@@ -20,7 +20,7 @@ curl http://localhost:31081/api/v1/connectivity_check
 Note that Kubespray does not invoke the check but only deploys the application, if
 requested.
 
-There are related application specifc variables:
+There are related application specific variables:
 ```
 netchecker_port: 31081
 agent_report_interval: 15