Added sponsors badge and Roboflow there #1984

Job	Run time
Check Readme is not outdated (3.8)	45s
Check code formatting with ruff and mypy + tests (3.8)	34s
Test and lint (ubuntu-latest, 3.8)	3m 2s
Test and lint (ubuntu-latest, 3.9)	5m 21s
Test and lint (ubuntu-latest, 3.10)	4m 57s
Test and lint (ubuntu-latest, 3.11)	4m 54s
Test and lint (ubuntu-latest, 3.12)	5m 38s
Test and lint (windows-latest, 3.8)	4m 55s
Test and lint (windows-latest, 3.9)	7m 54s
Test and lint (windows-latest, 3.10)	8m 5s
Test and lint (windows-latest, 3.11)	7m 43s
Test and lint (windows-latest, 3.12)	7m 38s
Test and lint (macos-latest, 3.8)	3m 53s
Test and lint (macos-latest, 3.9)	8m 26s
Test and lint (macos-latest, 3.10)	7m 12s
Test and lint (macos-latest, 3.11)	6m 30s
Test and lint (macos-latest, 3.12)	11m 21s
	1h 38m 48s

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