doc/reference/manifest: Adjust keywords description
#8068
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| 16s | |
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| 19m 25s | |
| 3m 46s | |
| 1m 50s | |
| 5m 12s | |
| 21s | |
| 28m 2s | |
| 16m 4s | |
| 57s | |
| 22m 14s | |
| 24m 44s | |
| 3m 44s | |
| 41m 44s | |
| 41m 54s | |
| 30m 58s | |
| 45m 40s | |
| 0s | |
| 0s | |
| 4h 47m 17s |