docs: added navigation by OS and fixed formatting for windows-nt.md
#563
| Job | Run time |
|---|---|
| 7s | |
| 11m 17s | |
| 6s | |
| 11m 30s |
windows-nt.md
#563
| Job | Run time |
|---|---|
| 7s | |
| 11m 17s | |
| 6s | |
| 11m 30s |