update readme

Author: anthony-nhs

README.md

@@ -257,16 +257,16 @@ This workflow updates `.devcontainer/devcontainer.json` with the latest publishe
 #### Requirements
 
 - `.devcontainer/devcontainer.json` must include `build.args.IMAGE_NAME` and `build.args.IMAGE_VERSION`.
-- `AUTOMERGE_APP_ID` and `AUTOMERGE_PEM` secrets must be configured so the workflow can create a GitHub App token for PR creation.
+- `CREATE_PULL_REQUEST_APP_ID` and `CREATE_PULL_REQUEST_PEM` secrets must be configured so the workflow can create a GitHub App token for PR creation.
 
 #### Inputs
 
 - `base_branch`: Target branch for the pull request. Default: `main`.
 
 #### Secret Inputs
 
-- `AUTOMERGE_APP_ID`: GitHub App ID used to generate an installation token.
-- `AUTOMERGE_PEM`: GitHub App private key used to generate an installation token.
+- `CREATE_PULL_REQUEST_APP_ID`: GitHub App ID used to generate an installation token.
+- `CREATE_PULL_REQUEST_PEM`: GitHub App private key used to generate an installation token.
 
 #### Outputs