docs: fix typo - it's -> its #1125

Job	Run time
js-test-and-release / check	1m 32s
js-test-and-release / test-firefox	28s
js-test-and-release / test-chrome	29s
js-test-and-release / test-node (windows-latest, lts/*)	3m 3s
js-test-and-release / test-chrome-webworker	28s
js-test-and-release / test-node (ubuntu-latest, lts/*)	2m 38s
js-test-and-release / test-firefox-webworker	26s
js-test-and-release / test-node (macos-latest, lts/*)	2m 50s
js-test-and-release / test-electron-main	31s
js-test-and-release / test-electron-renderer	27s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	1m 2s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	43s
js-test-and-release / test-webkit (macos-latest, lts/*)	1m 37s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	1m 59s
js-test-and-release / release-check	0s
js-test-and-release / release	0s
	18m 13s

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