docs(readme): say the --visual screenshots run through Selenium WebDriver

[GeiserX]

The README listed the browsers the visual comparison supports but never said what drives them. The code takes every screenshot with Selenium WebDriver (wayback_diff/visual_comparison.py, installed by the visual extra together with webdriver-manager), so anyone looking for a Selenium-based tool could not tell from the README.

This adds "driven by Selenium WebDriver" to the screenshots line under Features. Nothing else changes.

Summary by CodeRabbit

• Documentation
  • Clarified that screenshots are driven by Selenium WebDriver.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Repository: GeiserX/Wayback-Diff/.coderabbit.yaml
• Review profile: CHILL
• Plan: Advanced
• Run ID: bd16105e-b3cb-4cf4-b012-2585e9cff0ce

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📥 Commits

Reviewing files that changed from the base of the PR and between 507540a and 17129ac.

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📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

The README now states that Selenium WebDriver drives screenshots for Chrome, Firefox, Edge, and Opera.

Changes

Screenshot documentation

Layer / File(s)	Summary
Browser screenshot description README.md	The description identifies Selenium WebDriver as the driver for Chrome, Firefox, Edge, and Opera screenshots.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

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Merge Risk: ⚪ Minimal · up to 17129

This change clarifies that Selenium WebDriver drives the listed browser screenshots and does not alter runtime behavior. No actionable merge risk remains beyond normal checks.

Pre-merge checks | 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and specifically describes the README change about Selenium WebDriver screenshots.
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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