Docs: Correct replacement links for deprecated contextual help filters

[ekamran]

The inline documentation for the deprecated contextual_help_list, contextual_help, and default_contextual_help filters uses @see references like:

get_current_screen()->add_help_tab()
get_current_screen()->remove_help_tab()

These are rendered as broken DevHub links because they are method-call chains rather than resolvable function or method references.

The docs should instead reference:

get_current_screen()
WP_Screen::add_help_tab()
WP_Screen::remove_help_tab()

Related Documentation Issue Tracker issue:
​https://github.com/WordPress/Documentation-Issue-Tracker/issues/2290

Pull request:
​https://github.com/WordPress/wordpress-develop/pull/12071

## Summary

Fixes broken DevHub links for deprecated contextual help filters by replacing method-chain @see references with resolvable function and method references.

The updated docs now link to:

• get_current_screen()
• WP_Screen::add_help_tab()
• WP_Screen::remove_help_tab()

Related Documentation Issue Tracker issue: ​https://github.com/WordPress/Documentation-Issue-Tracker/issues/2290

## Testing

• git diff --check
• php -l src/wp-admin/includes/class-wp-screen.php

[yusufmudagal]

Tested PR: ​https://github.com/WordPress/wordpress-develop/pull/12071

Environment:

• macOS 26.5.1
• PHP 8.5.5
• WordPress develop checkout
• Tested PR commit: 896ab221ed
• Compared against trunk: 3f1fbe7e8d

Testing performed:

• Applied the PR locally in a clean worktree.
• Confirmed the patch only changes src/wp-admin/includes/class-wp-screen.php.
• Confirmed the change updates the three deprecated contextual help docblocks from method-call @see references like get_current_screen()->add_help_tab() to valid linkable references:
  • get_current_screen()
  • WP_Screen::add_help_tab()
  • WP_Screen::remove_help_tab()
• Confirmed WP_Screen::add_help_tab() and WP_Screen::remove_help_tab() exist in the same class.
• Confirmed get_current_screen() exists in src/wp-admin/includes/screen.php.
• Confirmed the runtime replacement strings passed to apply_filters_deprecated() are unchanged, so this is documentation-only and does not change deprecated filter behavior.

Local checks:

• php -l src/wp-admin/includes/class-wp-screen.php passed.
• git diff --check origin/trunk...HEAD -- src/wp-admin/includes/class-wp-screen.php passed.

Result:
The patch works as expected. The updated inline documentation should resolve to the correct Developer Hub references while preserving the existing runtime deprecation messages.

Note:
GitHub Actions currently shows all checks passing on the ticket/PR.