doc: add release hint for build from source

[libotony]

Description

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] New and existing E2E tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules
• [x] I have not added any vulnerable dependencies to my code

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 62.54%. Comparing base (5d05048) to head (fd39214).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #780 +/- ## ======================================= Coverage 62.54% 62.54% ======================================= Files 199 199 Lines 18140 18140 ======================================= Hits 11346 11346 Misses 5710 5710 Partials 1084 1084 ```

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