tests: fix invalid YAML

Dependencies

• [2] A4NSGFS3 LDAP: add VM test to flake.nix
• [3] B22SQY65 LDAP add test for roles and multiple users
• [*] RWNXH3H2 lastModified -> lastModifiedDate

Change contents

• replacement in flake.nix at line 428
  [2.2095]→[2.2095:2133](∅→∅)
  − start_tls_options
  [2.2095]

  [2.2133]
  + start_tls_options: