fix help string for qnamaker (#851)

* fix help string for qnamaker

* update docs

Co-authored-by: Vishwac Sena Kannan <[email protected]>
Co-authored-by: Emilio Munoz <[email protected]>

Author: 3 people

packages/cli/README.md

@@ -1606,7 +1606,7 @@ _See code: [@microsoft/bf-qnamaker](https://github.com/microsoft/botframework-cl
 
 ## `bf qnamaker:kb:export`
 
-Echos a knowledgebase json to stdout
+Echos a knowledgebase in json or qna format to stdout
 
 ```
 USAGE

packages/qnamaker/README.md

@@ -397,7 +397,7 @@ _See code: [src/commands/qnamaker/kb/delete.ts](https://github.com/microsoft/bot
 
 ## `bf qnamaker:kb:export`
 
-Echos a knowledgebase json to stdout
+Echos a knowledgebase in json or qna format to stdout
 
 ```
 USAGE

packages/qnamaker/src/commands/qnamaker/kb/export.ts

@@ -9,7 +9,7 @@ const exportKbJSON = require('./../../../../utils/payloads/exportkb')
 import {Inputs, processInputs} from '../../../utils/qnamakerbase'
 
 export default class QnamakerKbExport extends Command {
-  static description = 'Echos a knowledgebase json to stdout'
+  static description = 'Echos a knowledgebase in json or qna format to stdout'
 
   static flags: flags.Input<any> = {
     kbId: flags.string({description: 'Knowledgebase id to be exported. Overrides the knowledge base id present in the config'}),