FIX CI: test.yml > Check Style

[docjyJ]

Run cargo fmt --all --check
  cargo fmt --all --check
  shell: /usr/bin/bash -e {0}
Diff in /home/runner/work/mail-server/mail-server/crates/directory/src/backend/ldap/lookup.rs at line 368:
                        "posixaccount" | "individual" | "person" | "inetorgperson" => {
                             principal.typ = Type::Individual
                         }
-                        "posixgroup" | "groupofuniquenames" | "group" => principal.typ = Type::Group,
+                        "posixgroup" | "groupofuniquenames" | "group" => {
+                            principal.typ = Type::Group
+                        }
                         _ => continue,
                     }
                     break;
Error: Process completed with exit code 1.

Check Style of test.yml workflow fails every time...