Rename some default Hookshot variables

Fixup for 7e2e2626a0

Some references were left unrenamed which caused `validate_config.yml`
to trigger.

roles/custom/matrix-bridge-hookshot/defaults/main.yml

@@ -64,11 +64,11 @@ matrix_hookshot_github_private_key_file: 'private-key.pem'
 matrix_hookshot_github_webhook_secret: ''  # "Webhook secret" on the GitHub App page
 matrix_hookshot_github_oauth_enabled: false
 # You need to configure oauth settings only when you have enabled oauth (optional)
-matrix_hookshot_github_oauth_id: ''  # "Client ID" on the GitHub App page
-matrix_hookshot_github_oauth_secret: ''  # "Client Secret" on the GitHub App page
+matrix_hookshot_github_oauth_client_id: ''  # "Client ID" on the GitHub App page
+matrix_hookshot_github_oauth_client_secret: ''  # "Client Secret" on the GitHub App page
 # Default value of matrix_hookshot_github_oauth_endpoint: "/hookshot/webhooks/oauth"
 matrix_hookshot_github_oauth_endpoint: "{{ matrix_hookshot_webhook_endpoint }}/oauth"
-matrix_hookshot_github_oauth_uri: "{{ matrix_hookshot_urlprefix }}{{ matrix_hookshot_github_oauth_endpoint }}"
+matrix_hookshot_github_oauth_redirect_uri: "{{ matrix_hookshot_urlprefix }}{{ matrix_hookshot_github_oauth_endpoint }}"
 
 # These are the default settings mentioned here and don't need to be modified: https://matrix-org.github.io/matrix-hookshot/usage/room_configuration/github_repo.html#configuration
 matrix_hookshot_github_defaultOptions_ignoreHooks: {}  # noqa var-naming