add MSRV changelog entry

Author: almindor

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Use `portable-atomic` to allow builds on `riscv32imc-unknown-none-elf`` targets when needed
 - Update `embedded-hal` version to `1.0` changing `delay`, `spi`, `i2c`, `gpio` and `pwm` modules to match
 - `I2c::free` renamed to `I2c::release`
+- Bumped MSRV to `1.62`
 
 ## [v0.10.0] - 2023-03-28