Minor update to Packages API docs

doc/api/packages.md

@@ -92,7 +92,7 @@ GET /groups/:id/packages
 | `include_versionless` | boolean | no | When set to true, versionless packages are included in the response. (_Introduced in GitLab 13.8_)
 
 ```shell
-curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/:id/packages?exclude_subgroups=true"
+curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/:id/packages?exclude_subgroups=false"
 ```
 
 > **Deprecation:**
@@ -264,7 +264,7 @@ GET /projects/:id/packages/:package_id/package_files
 | `package_id`      | integer | yes | ID of a package. |
 
 ```shell
-curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/packages/4/package_files"
+curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/:id/packages/4/package_files"
 ```
 
 Example response: