Update MSRV to 1.73.0

Author: maniwani

Cargo.toml

@@ -10,7 +10,7 @@ keywords = ["game", "engine", "gamedev", "graphics", "bevy"]
 license = "MIT OR Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/bevyengine/bevy"
-rust-version = "1.70.0"
+rust-version = "1.73.0"
 
 [workspace]
 exclude = [