fix(core): Use correct Gmail OAuth2 credential type in eval credential seeder (no-changelog) (#33825)

.agents/skills/create-instance-ai-eval/case-shapes.md

@@ -123,7 +123,7 @@ of mocked) set the type's `EVAL_*` env var — e.g. `EVAL_SLACK_ACCESS_TOKEN`,
 Only a closed set of types is valid — declaring anything else fails at case-load
 with a pointer to add a template. From
 [`credentials/seeder.ts`](../../../packages/@n8n/instance-ai/evaluations/credentials/seeder.ts):
-`slackApi`, `notionApi`, `githubApi`, `gmailOAuth2Api`,
+`slackApi`, `notionApi`, `githubApi`, `gmailOAuth2`,
 `microsoftTeamsOAuth2Api`, `whatsAppTriggerApi`, `httpHeaderAuth`,
 `httpBasicAuth`. Need another? Add a `CredentialTemplate` to `seeder.ts` (a
 `defaultName`, optional `envVar`, and `buildData(token)`); that extends

packages/@n8n/instance-ai/evaluations/credentials/seeder.ts

@@ -39,7 +39,7 @@ const CREDENTIAL_TEMPLATES: Record<string, CredentialTemplate> = {
 		envVar: 'EVAL_GITHUB_ACCESS_TOKEN',
 		buildData: (token) => ({ accessToken: token }),
 	},
-	gmailOAuth2Api: {
+	gmailOAuth2: {
 		defaultName: '[eval] Gmail',
 		envVar: 'EVAL_GMAIL_ACCESS_TOKEN',
 		buildData: (token) => ({ oauthTokenData: { access_token: token } }),