Fix meaning of "scons" by itself in Introduction to the Buildsystem

(cherry picked from commit 97e34daba4bdc863bf36c0f8fcc23b31d96c1f1a)

contributing/development/compiling/introduction_to_the_buildsystem.rst

@@ -12,16 +12,16 @@ that compiling Godot from source can be as simple as running::
 
     scons
 
-This produces an *export template* for your current platform, operating system, and architecture.
-An export template is a build of the engine that is used for running exported projects. To build
-the *editor* instead you can run the following command::
+This produces an editor build for your current platform, operating system, and architecture.
+You can change what gets built by specifying a target, a platform, and/or an architecture.
+For example, to build an export template used for running exported games, you can run::
 
-    scons target=editor
+    scons target=template_release
 
-If you plan to debug or develop the engine, then you might want to add another option to the command::
+If you plan to debug or develop the engine, then you might want to enable the ``dev_build``
+option to enable dev-only debugging code::
 
     scons dev_build=yes
-    scons target=editor dev_build=yes
 
 Following sections in the article will explain these and other universal options in more detail. But
 before you can compile Godot, you need to install a few prerequisites. Please refer to the platform