Remove periods from headings

Author: garritfra

content/en/docs/tasks/configure-pod-container/configure-service-account.md

@@ -29,7 +29,7 @@ When they do, they are authenticated as a particular Service Account (for exampl
 
 <!-- steps -->
 
-## Use the Default Service Account to access the API server.
+## Use the Default Service Account to access the API server
 
 When you create a pod, if you do not specify a service account, it is
 automatically assigned the `default` service account in the same namespace.
@@ -68,7 +68,7 @@ spec:
 
 The pod spec takes precedence over the service account if both specify a `automountServiceAccountToken` value.
 
-## Use Multiple Service Accounts.
+## Use Multiple Service Accounts
 
 Every namespace has a default service account resource called `default`.
 You can list this and any other serviceAccount resources in the namespace with this command:
@@ -136,7 +136,7 @@ You can clean up the service account from this example like this:
 kubectl delete serviceaccount/build-robot
 ```
 
-## Manually create a service account API token.
+## Manually create a service account API token
 
 Suppose we have an existing service account named "build-robot" as mentioned above, and we create
 a new secret manually.