[Docs] Update to the latest mkdocs-material and add the contributing/DOCS.md
#5814
| Job | Run time |
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| 2s | |
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| 41s | |
| 1m 47s | |
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| 9s | |
| 9s | |
| 29s | |
| 22s | |
| 2m 1s | |
| 2m 52s | |
| 4m 8s | |
| 3m 25s | |
| 3m 21s | |
| 3m 40s | |
| 2m 13s | |
| 4m 23s | |
| 3m 44s | |
| 2m 2s | |
| 4m 26s | |
| 2m 2s | |
| 4m 7s | |
| 1m 53s | |
| 7m 33s | |
| 50s | |
| 37s | |
| 13s | |
| 15s | |
| 1h 0m 10s |