Fix Incorrect share_streak_sharing_url Across the Project

[ivan-magda]

Describe the bug
The share_streak_sharing_url across various parts of the project is incorrect and needs to be updated to the new URL https://hyperskill.org/my-hyperskill-app.

To Reproduce
Steps to reproduce the behavior:

1. Go to any part of the app that references the sharing streak URL.
2. Click on the sharing streak link.
3. See that the URL is outdated and does not point to the correct page.

Expected behavior
The sharing streak URL should point to https://hyperskill.org/my-hyperskill-app.

Screenshots
If applicable, add screenshots to help explain the problem.

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Version [e.g. 22]

Additional context
This issue affects multiple files:

• shared/src/commonMain/moko-resources/base/strings.xml

Related Pull Request

• Update privacy policy URLs #1205
• Fix Incorrect Privacy Policy URLs Across the Project #1206