chore: fix readme bug

[JuroUhlar]

Solves #93

[github-actions]

This PR will not create a new release 🚀

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟢	Statements	96.74%	178/184
🟢	Branches	96.19%	101/105
🟢	Functions	85.48%	53/62
🟢	Lines	96.57%	169/175

Test suite run success

46 tests passing in 2 suites.

Report generated by 🧪jest coverage report action from f440322

Show full coverage report

St	File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
🟢	All files	96.73	96.19	85.48	96.57
🟢	src	97.97	95.4	81.48	97.84
🟢	client.ts	97.46	95.29	95.45	97.46	21,122
🟢	global.ts	100	100	100	100
🟢	index.ts	100	100	0	100
🟢	src/cache	95.29	100	88.57	95.12
🟢	cache-local-storage.ts	92.85	100	100	92.85	23
🟢	cache-manager.ts	100	100	100	100
🟢	cache-memory.ts	100	100	100	100
🟢	cache-session-storage.ts	92.85	100	100	92.85	33
🔴	cache-stub.ts	33.33	100	0	33.33	10-16
🟢	index.ts	100	100	100	100
🟢	shared.ts	100	100	100	100