[Site] Use `system-ui` font family #2963

Job	Run time
coding-style-php	41s
tests-js	1m 35s
JavaScript Coding Style	56s
Check for UnBuilt JS Dist Files	1m 39s
tests-php-components	6s
tests-php (8.1, lowest, Autocomplete)	3m 32s
tests-php (8.1, lowest, Chartjs)	23s
tests-php (8.1, lowest, Cropperjs)	35s
tests-php (8.1, lowest, Dropzone)	34s
tests-php (8.1, lowest, LazyImage)	31s
tests-php (8.1, lowest, LiveComponent)	35s
tests-php (8.1, lowest, Notify)	25s
tests-php (8.1, lowest, React)	38s
tests-php (8.1, lowest, StimulusBundle)	38s
tests-php (8.1, lowest, Svelte)	38s
tests-php (8.1, lowest, TogglePassword)	28s
tests-php (8.1, lowest, Translator)	33s
tests-php (8.1, lowest, TwigComponent)	21s
tests-php (8.1, lowest, Vue)	36s
tests-php (8.1, highest, Autocomplete)	28s
tests-php (8.1, highest, Chartjs)	30s
tests-php (8.1, highest, Cropperjs)	27s
tests-php (8.1, highest, Dropzone)	42s
tests-php (8.1, highest, LazyImage)	29s
tests-php (8.1, highest, LiveComponent)	43s
tests-php (8.1, highest, Notify)	36s
tests-php (8.1, highest, React)	38s
tests-php (8.1, highest, StimulusBundle)	41s
tests-php (8.1, highest, Svelte)	27s
tests-php (8.1, highest, TogglePassword)	24s
tests-php (8.1, highest, Translator)	20s
tests-php (8.1, highest, TwigComponent)	39s
tests-php (8.1, highest, Vue)	36s
	23m 4s

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