update documentation wording

Co-authored-by: Leah Wasser <[email protected]>

Author: djcopley

docs/config/environment/overview.md

@@ -105,7 +105,7 @@ features = [
 
 ### Dependency Groups
 
-You can include [PEP 735](https://peps.python.org/pep-0735/) dependency groups in your environments using the `dependency-groups` option:
+You can include [dependency.groups](https://packaging.python.org/en/latest/specifications/dependency-groups/#dependency-groups) defined by PEP 735 in your environments using the `[dependency-groups]` table:
 
 ```toml config-example
 [dependency-groups]
@@ -120,7 +120,7 @@ dependency-groups = [
 ]
 ```
 
-Dependency groups provide a standardized way to organize related dependencies and can be shared across different build systems. See [advanced usage](advanced.md#dependency-groups) for more details on dependency group features like including other groups.
+Dependency groups provide a standardized way to organize related development dependencies (such as tools used for tests, linting and type checking). They can be shared across different build systems. See [advanced usage](advanced.md#dependency-groups) for more details on dependency group features like including other groups.
 
 !!! note
     Unlike features which affect how the project itself is installed, dependency groups are separate dependencies that are installed alongside the project.