message: Remove prompt from README commands
  Most commands in QUIC READMEs don't include the prompt, but these do. If you're just copy/pasting commands to set up a new environment, it's annoying.
diff: @@ -39,7 +39,7 @@ rustup toolchain install nightly
  ```sh
  # Initialize the project's submodules
  -$ git submodule update --init
  +git submodule update --init
  ```
  ### Running a fuzz target
  @@ -49,13 +49,13 @@ You'll need to have `cargo-bolero` installed first.
  See Bolero's [instructions](https://camshaft.github.io/bolero/cli-installation.html) to install.
  ```bash
  -$ cargo bolero test varint -p s2n-quic-core -T 30sec --toolchain nightly-2021-09-12 -s address
  +cargo bolero test varint -p s2n-quic-core -T 30sec --toolchain nightly-2021-09-12 -s address
  ```
  Test targets can be executed on stable by disabling the sanitzer:
  ```bash
  -$ cargo bolero test varint -p s2n-quic-core -s NONE -T 30sec
  +cargo bolero test varint -p s2n-quic-core -s NONE -T 30sec
  ```
  ```bash
  