Correct the typo.

Author: suikan4github

CHANGELOG.md

@@ -22,7 +22,7 @@ Update to the v1.0.0. The major change is the SdkWrapper class. This class is no
 - [Issue #10](https://github.com/suikan4github/rpp_driver/issues/10) Cover APIs of the Raspberry Pi Pico SDK.
 - [Issue #15](https://github.com/suikan4github/rpp_driver/issues/15) Remove the redundant parameter check code from ConfigureSRC() 
 - [Issue #16](https://github.com/suikan4github/rpp_driver/issues/16) Change the member function name from ConfigureSRC() to ConfigureSrc().
-- [Issue #21](https://github.com/suikan4github/rpp_driver/issues/21) Add usege of the mock for each class description.
+- [Issue #21](https://github.com/suikan4github/rpp_driver/issues/21) Add usage of the mock for each class description.
 - [Issue #22](https://github.com/suikan4github/rpp_driver/issues/22) Refactor the test_i2cmaster.cpp to use the fixture.
 ### Deprecated
 - [Issue #12](https://github.com/suikan4github/rpp_driver/issues/12)  Is I2cMasterInterface needed?