Apply suggestions from code review

Co-authored-by: Hubert Chathi <hubert@uhoreg.ca>

data/api/client-server/definitions/sso_login_flow.yaml

@@ -27,8 +27,8 @@ properties:
       and would map to the appropriate IdP-dependent redirect endpoint for that
       IdP.
     example: [
-      {"id": "com.example.idp.github", "name": "Github", "brand": "github"},
-      {"id": "com.example.idp.gitlab", "name": "Gitlab", "icon": "mxc://example.com/abc123"},
+      {"id": "com.example.idp.github", "name": "GitHub", "brand": "github"},
+      {"id": "com.example.idp.gitlab", "name": "GitLab", "icon": "mxc://example.com/abc123"},
     ]
     items:
       type: object

informal/idp-brands.md

@@ -46,7 +46,7 @@ Suitable for "Sign in with Apple": see https://developer.apple.com/design/human-
 Logos available at https://github.com/logos.
 
 
-### Gitlab
+### GitLab
 
 **Identifier**: `gitlab`