Updated code of conduct to contributor covenant v2.1 #9485

Job	Run time
style	28s
Example notebooks (ubuntu-latest / Python 3.12)	18m 37s
Tests (ubuntu-latest / Python 3.9)	18m 37s
Example scripts (ubuntu-latest / Python 3.12)	10m 45s
Doctests (ubuntu-latest / Python 3.11)	5m 15s
Tests (ubuntu-latest / Python 3.10)	18m 58s
Tests (ubuntu-latest / Python 3.11)	16m 44s
Tests (ubuntu-latest / Python 3.12)	21m 17s
Tests (macos-12 / Python 3.9)	22m 34s
Tests (macos-12 / Python 3.10)	20m 25s
Tests (macos-12 / Python 3.11)	25m 16s
Tests (macos-12 / Python 3.12)	19m 1s
Tests (macos-14 / Python 3.9)	10m 59s
Tests (macos-14 / Python 3.10)	9m 19s
Tests (macos-14 / Python 3.11)	8m 54s
Tests (macos-14 / Python 3.12)	11m 48s
Tests (windows-latest / Python 3.9)	27m 34s
Tests (windows-latest / Python 3.10)	28m 58s
Tests (windows-latest / Python 3.11)	28m 40s
Tests (windows-latest / Python 3.12)	25m 53s
	5h 50m 2s

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