Improved message when inviting new users to organization (cvat-ai#6731)

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### Motivation and context
Users often confused about current implementation and enter email
addresses not registered on the service

Before: 

![image](https://github.com/opencv/cvat/assets/40690378/9b10abbb-d7b6-4db2-b951-e28a3a62ed1a)

**After:**

![image](https://github.com/opencv/cvat/assets/40690378/8f3e5ce5-cdca-4da4-8454-a2faad99230c)

### How has this been tested?
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- [ ] I submit my changes into the `develop` branch
- [ ] I have added a description of my changes into the
[CHANGELOG](https://github.com/opencv/cvat/blob/develop/CHANGELOG.md)
file
- [ ] I have updated the documentation accordingly
- [ ] I have added tests to cover my changes
- [ ] I have linked related issues (see [GitHub docs](

https://help.github.com/en/github/managing-your-work-on-github/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword))
- [ ] I have increased versions of npm packages if it is necessary

([cvat-canvas](https://github.com/opencv/cvat/tree/develop/cvat-canvas#versioning),

[cvat-core](https://github.com/opencv/cvat/tree/develop/cvat-core#versioning),

[cvat-data](https://github.com/opencv/cvat/tree/develop/cvat-data#versioning)
and

[cvat-ui](https://github.com/opencv/cvat/tree/develop/cvat-ui#versioning))

### License

- [x] I submit _my code changes_ under the same [MIT License](
https://github.com/opencv/cvat/blob/develop/LICENSE) that covers the
project.
  Feel free to contact the maintainers if that's a concern.

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Response code for empty cloud storage preview 204 -> 404 (<https://github.com/opencv/cvat/pull/6727>)
 - Organization now opened immediately after it is created (<https://github.com/opencv/cvat/pull/6705>)
+- Improved message when invite more users to an organization (<https://github.com/opencv/cvat/pull/6731>)
 
 ### Deprecated
 

cvat-ui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "cvat-ui",
-  "version": "1.55.3",
+  "version": "1.55.4",
   "description": "CVAT single-page application",
   "main": "src/index.tsx",
   "scripts": {

cvat-ui/src/components/organization-page/top-bar.tsx

@@ -8,6 +8,7 @@ import { useDispatch } from 'react-redux';
 import moment from 'moment';
 import { Row, Col } from 'antd/lib/grid';
 import Text from 'antd/lib/typography/Text';
+import Paragraph from 'antd/lib/typography/Paragraph';
 import Modal from 'antd/lib/modal';
 import Button from 'antd/lib/button';
 import Space from 'antd/lib/space';
@@ -339,7 +340,14 @@ function OrganizationTopBar(props: Props): JSX.Element {
                     layout='vertical'
                     form={form}
                 >
-                    <Text>Invitation list: </Text>
+                    <Paragraph>
+                        <Text>Invite CVAT users to collaborate </Text>
+                    </Paragraph>
+                    <Paragraph>
+                        <Text type='secondary'>
+                            If the email address is registered on CVAT, the user will be added to the organization
+                        </Text>
+                    </Paragraph>
                     <Form.List name='users'>
                         {(fields, { add, remove }) => (
                             <>