net/telemt: Update 3.4.18 => 3.4.22

Changelogs:

• https://github.com/telemt/telemt/releases/tag/3.4.19
• https://github.com/telemt/telemt/releases/tag/3.4.20
• https://github.com/telemt/telemt/releases/tag/3.4.21
• https://github.com/telemt/telemt/releases/tag/3.4.22

Commit log:
https://github.com/telemt/telemt/compare/3.4.18...3.4.22

PR: 296356
Approved by: osa, vvd (Mentors, implicit)