fix: update bluesky service url validation for subdomains

- Modifies URL validation regex to properly handle multiple subdomain segments
- Ensures domain segments start with alphanumeric characters
- Removes unnecessary IP address pattern

Fixes #952

Author: sginji

libraries/nestjs-libraries/src/integrations/social/bluesky.provider.ts

@@ -155,7 +155,7 @@ export class BlueskyProvider extends SocialAbstract implements SocialProvider {
         key: 'service',
         label: 'Service',
         defaultValue: 'https://bsky.social',
-        validation: `/^(https?:\\/\\/)?((([a-zA-Z0-9\\-_]{1,256}\\.[a-zA-Z]{2,6})|(([0-9]{1,3}\\.){3}[0-9]{1,3}))(:[0-9]{1,5})?)(\\/[^\\s]*)?$/`,
+        validation: `/^(https?:\\/\\/)?([a-zA-Z0-9][a-zA-Z0-9\\-_]*\\.)+[a-zA-Z]{2,}|([0-9]{1,3}\\.){3}[0-9]{1,3})(:[0-9]{1,5})?(\\/[^\\s]*)?$/`,
         type: 'text' as const,
       },
       {