# What this PR does
Added support for message template during phone number verification for
the Zvonok service. Template message support allows the use of
[SSML](https://www.w3.org/TR/2010/REC-speech-synthesis11-20100907/)
markup depending on the speaker used for speech synthesis.
Example: `Your verification code is <prosody
rate="x-slow">$verification_code</prosody>`
## Which issue(s) this PR fixes
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
---------
Co-authored-by: Innokentii Konstantinov <innokenty.konstantinov@grafana.com>
Co-authored-by: Joey Orlando <joey.orlando@grafana.com>
Co-authored-by: Joey Orlando <joseph.t.orlando@gmail.com>
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