Update GUIDE.md examples for the latest release.

[SyntaxSawdust]

Summary

I updated GUIDE.md to use the latest ripgrep release archive instead of 0.7.1. I refreshed the tutorial command outputs that depend on the archive contents. Recursive examples now use --sort path where stable path sorting is needed.

Why

This addresses #3448. The guide previously downloaded 0.7.1, but later examples search for lexopt. 0.7.1 has no lexopt matches, while 15.1.0 does.

Tests

• git grep -n "lexopt" 0.7.1 -> no matches
• git grep -n "lexopt" 15.1.0 -> matches found
• rg --version -> ripgrep 15.1.0
• Checked the refreshed examples against an archive-shaped ripgrep-15.1.0 tree
• git diff --check

Scope

• Docs only.
• GUIDE.md only.
• No code, tests, generated files, or release scripts changed.