Fix: LiteLLM API key field not showing in UI configuration (#4105)

Signed-off-by: jalateras <jima@comware.com.au>
Co-authored-by: Ebony Louis <55366651+EbonyLouis@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Jack Amadeo <jackamadeo@squareup.com>

crates/goose/src/providers/litellm.rs

@@ -142,7 +142,7 @@ impl Provider for LiteLLMProvider {
             vec![],
             LITELLM_DOC_URL,
             vec![
-                ConfigKey::new("LITELLM_API_KEY", false, true, None),
+                ConfigKey::new("LITELLM_API_KEY", true, true, None),
                 ConfigKey::new("LITELLM_HOST", true, false, Some("http://localhost:4000")),
                 ConfigKey::new(
                     "LITELLM_BASE_PATH",