[ko]: add index.md for web/glossary/main_thread (#16125)
#17546
| Job | Run time |
|---|---|
| 10m 15s | |
| 10m 15s |
web/glossary/main_thread (#16125)
#17546
| Job | Run time |
|---|---|
| 10m 15s | |
| 10m 15s |