Apply suggestions from code review

Fix linter complaint

Author: jamesmunns

README.md

@@ -343,7 +343,7 @@ The [`stm32-rs`](https://github.com/stm32-rs/stm32-rs) project has peripheral ac
 - [`esp32h2`](https://github.com/esp-rs/esp-pacs/tree/main/esp32h2) - [![crates.io](https://img.shields.io/crates/v/esp32h2.svg)](https://crates.io/crates/esp32h2)
 - [`esp32s2`](https://github.com/esp-rs/esp-pacs/tree/main/esp32s2) - [![crates.io](https://img.shields.io/crates/v/esp32s2.svg)](https://crates.io/crates/esp32s2)
 - [`esp32s3`](https://github.com/esp-rs/esp-pacs/tree/main/esp32s3) - [![crates.io](https://img.shields.io/crates/v/esp32s3.svg)](https://crates.io/crates/esp32s3)
-- [`esp8266`](https://github.com/esp-rs/esp8266) - [![crates.io](https://img.shields.io/crates/v/esp8266.svg)](https://crates.io/crates/esp8266) _note: esp8266 is archived, no further development planned_
+- [`esp8266`](https://github.com/esp-rs/esp8266) - [![crates.io](https://img.shields.io/crates/v/esp8266.svg)](https://crates.io/crates/esp8266) *note: esp8266 is archived, no further development planned*
 
 ### Ambiq Micro