Update dependency yjs to v13.6.12 #103

Job	Run time
Metadata	10s
Install Dependencies	3m 4s
Admin-X Settings tests	4m 6s
Admin tests - Chrome	3m 16s
Comments-UI tests	1m 18s
Ghost-CLI tests	4m 29s
Database tests (Node 18.12.1, mysql8)	6m 20s
i18n	25s
Database tests (Node 18.12.1, sqlite3)	3m 42s
Lint	3m 9s
Performance tests	1s
Regression tests (Node 18.12.1, mysql8)	3m 12s
Signup-form tests	1m 24s
Regression tests (Node 18.12.1, sqlite3)	1m 59s
Unit tests (Node 18.12.1)	2m 36s
Browser tests	3m 2s
Coverage	14s
All required tests passed or skipped	1s
Canary	0s
	42m 28s

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