Fix path-params title (preventing zola from building)

[Telroshan]

Description

The path-params doc didn't have quotes around its title, resulting in the following error when attempting to execute zola serve to run the htmx website locally

Building site...
Error: Failed to serve the site
Error: Error when parsing front matter of section `\\?\D:\workspace\git\htmx\www\content\extensions\path-params.md`        
Error: Reason: TOML parse error at line 2, column 9
  |
2 | title = path-params
  |         ^
invalid string
expected `"`, `'`

Checklist

• I have read the contribution guidelines
• I have targeted this PR against the correct branch (master for website changes, dev for
  source changes)
• This is either a bugfix, a documentation update, or a new feature that has been explicitly
  approved via an issue
• I ran the test suite locally (npm run test) and verified that it succeeded