docs(expect): link to matcher docs

[kt3k]

related #5455

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.30%. Comparing base (abdecb3) to head (6c13733).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5502   +/-   ##
=======================================
  Coverage   96.30%   96.30%           
=======================================
  Files         464      465    +1     
  Lines       37679    37705   +26     
  Branches     5561     5561           
=======================================
+ Hits        36286    36312   +26     
  Misses       1351     1351           
  Partials       42       42           

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[iuioiua]

Suggested change

	* - [`toBe`](./doc/~/Expected.toBe)
	* - {@linkcode Expected.toBe}

or

 *   - {@linkcode Expected.toBe | toBe}

[iuioiua]

Actually, we still don't document how use the API (e.g. expect.toBe). We should do that before publishing expect@1.0.0.