Fix typo in README example
Fix typo in README example

tarbrain/OHHTTPStubs,danielctull-forks/OHHTTPStubs,danielctull-forks/OHHTTPStubs,danielctull-forks/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,tarbrain/OHHTTPStubs,tarbrain/OHHTTPStubs,danielctull-forks/OHHTTPStubs,tarbrain/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,HyprMXMobile/OHHTTPStubs