Fix deprecation warnings and improve logging in tests

[yuriverweij]

Testing utility improvements:

• Replaced the use of verifyNoMoreInteractions with ensureNoUnverifiedInteractions in utest/test/keywords/test_browsermanagement.py as fix for deprecation.

Test reporter enhancements:

• Changed the reporter setup in utest/test/api/test_plugin_documentation.py to use FirstWorkingReporter with a fallback to PythonNativeReporter, to give better readable logging in pipeline runs.
  Now when a test fails in CI, instead of the ReporterNotWorkingException, we get a full inline diff printed to log showing exactly what changed. FirstWorkingReporter will try the GUI diff tool first (useful locally if Diffuse is installed), and fall back to PythonNativeReporter

[Copilot]

Pull request overview

Updates test utilities and approval-test reporting to remove deprecation warnings and make failure reporting more robust.

Changes:

• Replaced deprecated verifyNoMoreInteractions with ensureNoUnverifiedInteractions in a browser management unit test.
• Updated approval-test reporter selection to use FirstWorkingReporter with a PythonNativeReporter fallback.
• Synced approval “golden” output and corrected a doc example typo/formatting in SeleniumLibrary’s documentation text.

Reviewed changes

Copilot reviewed 2 out of 4 changed files in this pull request and generated no comments.

File	Description
utest/test/keywords/test_browsermanagement.py	Removes deprecated Mockito API usage by switching to ensureNoUnverifiedInteractions.
utest/test/api/test_plugin_documentation.py	Wraps reporter selection with FirstWorkingReporter(..., PythonNativeReporter()) to improve failure reporting behavior.
utest/test/api/approved_files/PluginDocumentation.test_many_plugins.approved.txt	Updates approved output to match current generated plugin documentation formatting.
src/SeleniumLibrary/init.py	Fixes documentation table content (${element } → ${element}) so generated docs/approvals align.

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