[fix][doc] Correcting spelling mistakes

[daziz]

What changes were proposed in this pull request?

Correcting spelling mistakes (Please fill in changes proposed in this fix)

How was this patch tested?

(Please explain how this patch was tested. Ex: unit tests, manual tests) (If this patch involves UI changes, please attach a screen-shot; otherwise, remove this)

Please review Ambari Contributing Guide before opening a pull request.

[smallyao]

You can file a jira ticket to track this issue and change this PR title like AMBARI-XXXXX: XXXXXXXX

[JiaLiangC]

@daziz Could you create a jira to track this issue?

[JiaLiangC]

Given that daziz has not been active and does not have an Ambari issue account, I have already helped create and link the corresponding issue. https://issues.apache.org/jira/browse/AMBARI-26104