chore: fix missing newline at end of rust.gdextension file

Ensure the file ends with a newline to comply with POSIX standards and avoid potential issues with text processing tools.

Author: FrankCasanova

squash-the-creeps/godot/rust.gdextension

@@ -13,4 +13,4 @@ macos.release = "res://../../target/release/libsquash_the_creeps.dylib"
 macos.debug.arm64 = "res://../../target/debug/libsquash_the_creeps.dylib"
 macos.release.arm64 = "res://../../target/release/libsquash_the_creeps.dylib"
 web.debug.wasm32 = "res://../../target/wasm32-unknown-emscripten/debug/squash_the_creeps.wasm"
-web.release.wasm32 = "res://../../target/wasm32-unknown-emscripten/release/squash_the_creeps.wasm"
+web.release.wasm32 = "res://../../target/wasm32-unknown-emscripten/release/squash_the_creeps.wasm"