ci(pr-template): Add PR template for Wiki updates

Author: aRustyDev

.github/PULL_REQUEST_TEMPLATE/wiki-update.md

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+## Summary
+
+<!-- Brief description of Wiki changes -->
+
+## Wiki Pages Affected
+
+<!-- List the Wiki pages being added, modified, or removed -->
+
+- [ ] New page(s) added
+- [ ] Existing page(s) updated
+- [ ] Page(s) removed/deprecated
+
+## Type of Wiki Change
+
+- [ ] New documentation
+- [ ] Content update/correction
+- [ ] Restructuring/reorganization
+- [ ] Formatting/style improvements
+- [ ] Link fixes
+- [ ] Image/media updates
+
+## Related Issues
+
+<!-- Link to related issues: Fixes #123, Relates to #456 -->
+
+## Checklist
+
+- [ ] Content is accurate and up-to-date
+- [ ] Links are valid and working
+- [ ] Spelling and grammar checked
+- [ ] Formatting is consistent with existing Wiki style
+- [ ] Table of contents updated (if applicable)
+- [ ] Cross-references to other Wiki pages are correct
+- [ ] Images/screenshots are clear and properly sized (if applicable)
+
+## Preview
+
+<!-- If possible, provide a preview link or screenshot of the changes -->
+
+## Additional Context
+
+<!-- Any other information reviewers should know -->