Add OpenAI as secret scanning partner (#18896)

Author: Grey Baker

data/reusables/secret-scanning/partner-secret-list-private-repo.md

@@ -54,6 +54,7 @@ Mailchimp | Mailchimp API Key | mailchimp_api_key
 Mailgun | Mailgun API Key | mailgun_api_key
 npm | npm Access Token | npm_access_token
 NuGet | NuGet API Key | nuget_api_key
+OpenAI | OpenAI API Key | openai_api_key
 Palantir | Palantir JSON Web Token | palantir_jwt
 Postman | Postman API Key | postman_api_key
 Proctorio | Proctorio Consumer Key | proctorio_consumer_key

data/reusables/secret-scanning/partner-secret-list-public-repo.md

@@ -47,6 +47,7 @@ Mailgun | Mailgun API Key
 MessageBird | MessageBird API Key
 npm | npm Access Token
 NuGet | NuGet API Key
+OpenAI | OpenAI API Key
 Palantir | Palantir JSON Web Token
 Plivo | Plivo Auth Token
 Postman | Postman API Key