Update modules/integrating-with-github/proc-enabling-github-repository-discovery.adoc

Co-authored-by: Jessica He <[email protected]>

Author: themr0c

modules/integrating-with-github/proc-enabling-github-repository-discovery.adoc

@@ -152,7 +152,6 @@ integrations:
         - appId: ${GITHUB_INTEGRATION_APP_ID}
           clientId: ${GITHUB_INTEGRATION_CLIENT_ID}
           clientSecret: ${GITHUB_INTEGRATION_CLIENT_SECRET}
-          webhookSecret: ${GITHUB_INTEGRATION_WEBHOOK_SECRET}
           privateKey: |
             ${GITHUB_INTEGRATION_PRIVATE_KEY_FILE}
 ----