ravedude: Suggest stable toolchain for installation

Suggest users to use the `stable` toolchain when installing ravedude via
cargo.  Also, suggest using the `--locked` flag to ensure deterministic
dependencies.

ravedude/README.md

@@ -4,39 +4,50 @@ ravedude [![crates.io page](https://img.shields.io/crates/v/ravedude.svg)](https
 super smooth.  It's a wrapper around `avrdude` and provides easy access to the
 target's serial console, similar to the Arduino IDE.
 
+
 `ravedude` is meant to be used as a cargo "runner".  This allows you to just use
 `cargo run` for building, deploying, and running your AVR code!
 
+
 if you get an `Error: no matching serial port found, use -P or set RAVEDUDE_PORT in your environment` , 
 run `cargo run` with set environment variable or adjust `runner = "ravedude {X} -cb {X} -P /dev/ttyUSB{X}"` inside `.cargo/config.toml` (replace {X} with your respective values)
 
+
 ## Installation
 On Linux systems, you'll need pkg-config and libudev development files
 installed:
 
+
 - *Archlinux*: `pacman -S systemd pkgconf`
 - *Ubuntu/Debian*: `apt install libudev-dev pkg-config`
 - *Fedora*: `dnf install systemd-devel pkgconf-pkg-config`
 
+
 Next, install the latest version from crates.io with the following command:
 
+
 ```bash
-cargo install ravedude
+cargo +stable install --locked ravedude
 ```
 
+
 Alternatively, if you're using Nix (the package manager) + Flakes, you can install `ravedude` by adding `inputs.ravedude.url = "github:Rahix/avr-hal?dir=ravedude";` and use the package `ravedude.packages."${system}".default`.
 
+
 Now you need to add *ravedude* to your project.  For example in a project for
 Arduino Uno, place the following into your `.cargo/config.toml` (**not in
 `Cargo.toml`**):
 
+
 ```toml
 [target.'cfg(target_arch = "avr")']
 runner = "ravedude uno --open-console --baudrate 57600"
 ```
 
+
 And that's all, now just call `cargo run` and watch it do its magic:
 
+
 <pre style="background-color: #191919; color: #FFF"><font color="#A1EFE4"><b>avr-hal/examples/arduino-uno</b></font> on <font color="#AE81FF"><b>ravedude</b></font> via <font color="#F92672"><b>v1.51.0-nightly </b></font>
 <font color="#A6E22E"><b>❯</b></font> cargo run --bin uno-i2cdetect
 <font color="#A6E22E"><b>   Compiling</b></font> arduino-uno-examples v0.0.0 (avr-hal/examples/arduino-uno)
@@ -45,62 +56,41 @@ And that's all, now just call `cargo run` and watch it do its magic:
 <font color="#A6E22E"><b>       Board</b></font> Arduino Uno
 <font color="#A6E22E"><b> Programming</b></font> avr-hal/target/avr-atmega328p/debug/uno-i2cdetect.elf <font color="#66D9EF"><b>=&gt;</b></font> /dev/ttyACM0
 
+
 avrdude: AVR device initialized and ready to accept instructions
 
+
 Reading | ################################################## | 100% 0.00s
 
+
 avrdude: Device signature = 0x1e950f (probably m328p)
 avrdude: erasing chip
 avrdude: reading input file &quot;avr-hal/target/avr-atmega328p/debug/uno-i2cdetect.elf&quot;
 avrdude: writing flash (1654 bytes):
 
+
 Writing | ################################################## | 100% 0.27s
 
+
 avrdude: 1654 bytes of flash written
 avrdude: verifying flash memory against avr-hal/target/avr-atmega328p/debug/uno-i2cdetect.elf:
 avrdude: load data flash data from input file avr-hal/target/avr-atmega328p/debug/uno-i2cdetect.elf:
 avrdude: input file avr-hal/target/avr-atmega328p/debug/uno-i2cdetect.elf contains 1654 bytes
 avrdude: reading on-chip flash data:
 
+
 Reading | ################################################## | 100% 0.21s
 
+
 avrdude: verifying ...
 avrdude: 1654 bytes of flash verified
 
+
 avrdude: safemode: Fuses OK (E:00, H:00, L:00)
 
+
 avrdude done.  Thank you.
 
+
 <font color="#A6E22E"><b>  Programmed</b></font> avr-hal/target/avr-atmega328p/debug/uno-i2cdetect.elf
 <font color="#A6E22E"><b>     Console</b></font> /dev/ttyACM0 at 57600 baud
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-</pre>
-
-## License
-*ravedude* is licensed under either of
-
- * Apache License, Version 2.0 ([LICENSE-APACHE](../LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
- * MIT license ([LICENSE-MIT](../LICENSE-MIT) or http://opensource.org/licenses/MIT)
-
-at your option.