Change pal to crates.io version

Author: nisembedded

Cargo.toml

@@ -22,7 +22,7 @@ nb = "1.0.0"
 fugit = "0.3.5"
 
 [dependencies.stm32c0]
-git = "https://github.com/stm32-rs/stm32-rs-nightlies"
+version = "0.16.0"
 features = ["rt"]
 
 [dependencies.bare-metal]