docs: Small clarification to avoid confusion (#410)

* Replace code to avoid confusing tool with the packaging tools

* Avoid confusing between tool (the code in the package) and tool as in packaging tools

package-structure-code/intro.md

@@ -111,11 +111,11 @@ and for anyone who is just getting started with creating a Python package.
 In this section of our Python packaging guide, we:
 
 - Provide an overview of the options available to you when packaging your
-  tool.
+  code.
 - Suggest tools and approaches that both meet your needs and also support
   existing standards.
 - Suggest tools and approaches that will allow you to expand upon a workflow
-  that may begin as a pure Python tool and evolve into a tool that requires
+  that may begin as a pure Python code and evolve into code that requires
   addition layers of complexity in the packaging build.
 - Align our suggestions with the most current, accepted
   [PEPs (Python Enhancement Protocols)](https://peps.python.org/pep-0000/)