Added sponsors badge and Roboflow there (#1566) #1985

Job	Run time
Test and lint (ubuntu-latest, 3.8)	3m 6s
Check Readme is not outdated (3.8)	24s
Check code formatting with ruff and mypy + tests (3.8)	40s
Test and lint (ubuntu-latest, 3.9)	5m 2s
Test and lint (ubuntu-latest, 3.10)	5m 6s
Test and lint (ubuntu-latest, 3.11)	4m 47s
Test and lint (ubuntu-latest, 3.12)	5m 37s
Test and lint (windows-latest, 3.8)	5m 11s
Test and lint (windows-latest, 3.9)	7m 47s
Test and lint (windows-latest, 3.10)	8m 8s
Test and lint (windows-latest, 3.11)	8m 57s
Test and lint (windows-latest, 3.12)	9m 34s
Test and lint (macos-latest, 3.8)	4m 11s
Test and lint (macos-latest, 3.9)	7m 3s
Test and lint (macos-latest, 3.10)	6m 37s
Test and lint (macos-latest, 3.11)	7m 38s
Test and lint (macos-latest, 3.12)	7m 18s
	1h 37m 6s

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