Remove redundant text from Sponsors section

Eliminated "Help bitrix24-php-sdk by" to streamline the Sponsors section. This change improves readability and ensures the call-to-action is more direct.

Signed-off-by: mesilov <mesilov.maxim@gmail.com>

Author: mesilov

README.md

@@ -345,7 +345,7 @@ in this project.
 
 ## Sponsors
 
-Help bitrix24-php-sdk by [boosty.to/bitrix24-php-sdk](https://boosty.to/bitrix24-php-sdk)
+[boosty.to/bitrix24-php-sdk](https://boosty.to/bitrix24-php-sdk)
 
 ## Need custom Bitrix24 application?