Sync .cargo/config.toml with book "Web export" chapter

Adds this argument:
  -Cllvm-args=-enable-emscripten-cxx-exceptions=0

Author: Bromeon

dodge-the-creeps/rust/.cargo/config.toml

@@ -1,9 +1,12 @@
+# Users: see https://godot-rust.github.io/book/toolchain/export-web.html for details.
+
 # The cargo flag "-Zbuild-std" is also required but this cannot yet be specified for specific
 # targets: https://github.com/rust-lang/cargo/issues/8733
 [target.wasm32-unknown-emscripten]
 rustflags = [
+    "-C", "link-args=-pthread", # assumes threads enabled.
     "-C", "link-args=-sSIDE_MODULE=2",
-    "-C", "link-args=-pthread",
     "-C", "target-feature=+atomics,+bulk-memory,+mutable-globals",
     "-Zlink-native-libraries=no",
+    "-Cllvm-args=-enable-emscripten-cxx-exceptions=0",
 ]