Fix Codespell complaints

Author: khoih-prog

README.md

@@ -7,8 +7,6 @@
 [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](#Contributing)
 [![GitHub issues](https://img.shields.io/github/issues/khoih-prog/AsyncDNSServer_STM32.svg)](http://github.com/khoih-prog/AsyncDNSServer_STM32/issues)
 
-<a href="https://www.buymeacoffee.com/khoihprog6" target="_blank"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" style="height: 60px !important;width: 217px !important;" ></a>
-
 ---
 ---
 
@@ -155,7 +153,7 @@ Supposing the STM32 stm32 core version is 1.9.0. These files must be copied into
 - `~/.arduino15/packages/STM32/hardware/stm32/1.9.0/system/STM32F7xx/stm32f7xx_hal_conf_default.h` for Nucleo-144 STM32F7.
 
 Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz,
-theses files must be copied into the corresponding directory:
+these files must be copied into the corresponding directory:
 
 - `~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/system/STM32F4xx/stm32f4xx_hal_conf_default.h`
 - `~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/system/STM32F7xx/stm32f7xx_hal_conf_default.h
@@ -171,7 +169,7 @@ Supposing the STM32 stm32 core version is 1.9.0. These files must be copied into
 - `~/.arduino15/packages/STM32/hardware/stm32/1.9.0/variants/NUCLEO_L053R8/variant.h` for Nucleo-64 NUCLEO_L053R8.
 
 Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz,
-theses files must be copied into the corresponding directory:
+these files must be copied into the corresponding directory:
 
 - `~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/variants/NUCLEO_F767ZI/variant.h`
 - `~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/variants/NUCLEO_L053R8/variant.h`