fix: change readme to use stable rust toolchain

README.md

@@ -302,38 +302,35 @@ For the DuckDB extension to call the Rust code a tool called `cbindgen` is used
 
 The headers can be updated by running `make rust_binding_headers`.
 
-#### Building on macOS
+#### Building on MacOS X
 
 Example setup + build steps for macOS users:
 
 ```sh
-# Remove rust if previously installed via brew 
+# Remove rust if previously installed via brew
 brew uninstall rust
 
 # Install rustup + cbindgen
 # (use rustup to switch versions of Rust without extra fuss)
 brew install cbindgen rustup
 
-# Install nightly rust toolchain
-rustup toolchain install nightly
+rustup toolchain install stable
 
 # Initialize rustup
 # Zsh users: customize installation, answer n to "Modify PATH variable?",
 # and continue with defaults for everything else
 rustup-init
 
 # OPTIONAL step for zsh users: add rust + cargo env setup to zshrc:
-echo '. "$HOME/.cargo/env"' >> ~/.zshrc 
+echo '. "$HOME/.cargo/env"' >> ~/.zshrc
 
-# Use rustc nightly version by default
-rustup default nightly
+# Use rustc stable version by default
+rustup default stable
 
 # Build headers
 make rust_binding_headers
 
-# Using ninja for theorhetical parallel build steps (untested!)
-# Set CMAKE_BUILD_PARALLEL_LEVEL to the number of cores on your machine
-GEN=ninja CMAKE_BUILD_PARALLEL_LEVEL=8 make
+GEN=ninja make
 ```
 
 ### Build steps