updated compiling docs to remove debug_syhmbols flag, as it is not available. (#404)

Author: ketexon

docs/src/doc/advanced/1-compiling.md

@@ -30,9 +30,11 @@ Sconstruct.
 In order to compile you should run `scons` command, as for all gdextension projects.
 
 ```
-scons platform=<macos|linux|windows|ios|android> target=<editor|template_debug|template_release> debug_symbols<yes|no> --jobs=<desired number of threads>
+scons platform=<macos|linux|windows|ios|android> target=<editor|template_debug|template_release> --jobs=<desired number of threads>
 ```
 
+If `target` is `editor` or `template_debug`, debug symbols will be generated.
+
 ### Additional Instructions
 
 On Windows, you need to pass the `arch` argument with values `x86_64` or `x86_32`.
@@ -47,4 +49,4 @@ You can also specify the FMOD directory as an argument, so you don't need to pla
 Example:
 ```
 scons platform=windows arch=x86_64 target=editor fmod_lib_dir=libs/
-```
+```