fix: ignore unread count for thread replies

[vishalnarkhede]

CLA

• I have signed the Stream CLA (required).
• Code changes are tested

Description of the changes, What, Why and How?

Changelog

[github-actions]

Size Change: +41 B (0%)

Total Size: 285 kB

Filename	Size	Change
dist/browser.es.js	62.3 kB	+8 B (0%)
dist/browser.full-bundle.min.js	34.4 kB	+6 B (0%)
dist/browser.js	62.9 kB	+9 B (0%)
dist/index.es.js	62.3 kB	+9 B (0%)
dist/index.js	63 kB	+9 B (0%)

_{compressed-size-action}