Update oidc.mdx

Co-authored-by: Timo Kössler <info@timokoessler.de>

Author: alex289

content/docs/guides/oidc.mdx

@@ -11,7 +11,7 @@ OrcaCD supports OIDC authentication, allowing users to log in using their existi
 	access through weak or compromised passwords. Before disabling password login, make sure the OIDC
 	authentication is properly configured and tested.
 
-    To disable password login, set the `DisableLocalAuth` environment variable. Look at the [environment variables documentation](/docs/configuration/env-variables) for more details.
+    To disable password login, set the `DISABLE_LOCAL_AUTH` environment variable. Look at the [environment variables documentation](/docs/configuration/env-variables) for more details.
 
 </Callout>