Document how to migrate from GHES to GHEC using the API (#32699)

Author: lecoursen

contributing/content-markup-reference.md

@@ -202,11 +202,11 @@ These instructions are pertinent to GitHub Enterprise Importer CLI users.
 ```
 
 ```
-{% graphql %}
+{% api %}
 
-These instructions are pertinent to GraphQL API users.
+These instructions are pertinent to API users.
 
-{% endgraphql %}
+{% endapi %}
 ```
 
 ```

lib/all-tools.js

@@ -1,11 +1,11 @@
 // all the tools available for the Tool Picker
 export const allTools = {
+  api: 'API',
   bash: 'Bash',
   cli: 'GitHub CLI',
   codespaces: 'Codespaces',
   curl: 'cURL',
   desktop: 'Desktop',
-  graphql: 'GraphQL API',
   importer_cli: 'GitHub Enterprise Importer CLI',
   jetbrains: 'JetBrains IDEs (Beta)',
   powershell: 'PowerShell',