Update contribution_tools.md (#1517)

VS Code is a Code editor, not an IDE!

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>

docs/project/contribution_tools.md

@@ -347,9 +347,9 @@ Our recommended way of installing is to use
 
 ### Visual Studio Code
 
-[Visual Studio Code](https://code.visualstudio.com/) is an IDE used by several
-of us. We provide [recommended extensions](/.vscode/extensions.json) to assist
-Carbon development. Some settings changes must be made separately:
+[Visual Studio Code](https://code.visualstudio.com/) is a code editor used by
+several of us. We provide [recommended extensions](/.vscode/extensions.json) to
+assist Carbon development. Some settings changes must be made separately:
 
 -   Python › Formatting: Provider: `black`