Update READMEs to use GitHub admonition syntax, use --import CLI ar…

…gument

CONTRIBUTING.md

@@ -2,10 +2,10 @@
 
 Thank you for your interest in contributing!
 
-> **Note**
+> [!NOTE]
 >
-> This project only supports Godot's `master` branch (4.0's development branch),
-> not Godot 3.x.  
+> This project only supports Godot's `master` branch (4.x's development branch),
+> not Godot 3.x.
 > Attempting to open this project in Godot 3.x will result in errors.
 
 ## Adding new benchmarks
@@ -59,7 +59,9 @@ Remember to follow the
 when writing new scripts. Adding type hints is recommended whenever possible,
 unless you are specifically benchmarking non-typed scripts.
 
-> C# benchmark functions must begin with `Benchmark`, instead of `benchmark_`.  
+> [!NOTE]
+>
+> C# benchmark functions must begin with `Benchmark`, instead of `benchmark_`.
 > For C# benchmarks to be available, you must use the .NET version of the engine.
 
 ### Test the benchmark

README.md

@@ -28,16 +28,14 @@ The results JSON is printed to standard output once all benchmarks are run.
 You can save the results JSON to a file using `--save-json="path/to/file.json"`
 (the target folder **must** exist).
 
-> **Note**
+> [!TIP]
 >
-> To import the project in the editor from the command line, use `godot --editor --quit`.
-> If this doesn't work, use `timeout 30 godot --editor`.
+> To import the project in the editor from the command line, use `godot --import`.
 
-> **Note**
+> [!NOTE]
 >
 > `godot` is assumed to be in your `PATH` environment variable here. If this is
-> not the case, replace `godot` with the absolute path to your Godot editor or export template
-> binary.
+> not the case, replace `godot` with the absolute path to your Godot editor or export template binary.
 
 #### Run all benchmarks