Change 'an' to 'a' #6251

Job	Run time
Multi-language repository (ubuntu-latest, stable-v2.15.5)	3m 43s
Multi-language repository (macos-latest, stable-v2.16.6)	9m 29s
Multi-language repository (macos-latest, stable-v2.15.5)	9m 24s
Multi-language repository (ubuntu-latest, stable-v2.16.6)	3m 58s
Multi-language repository (macos-latest, stable-v2.17.6)	11m 2s
Multi-language repository (macos-latest, stable-v2.18.4)	10m 24s
Multi-language repository (macos-latest, nightly-latest)	10m 36s
Multi-language repository (ubuntu-latest, default)	3m 56s
Multi-language repository (ubuntu-latest, stable-v2.17.6)	3m 58s
Multi-language repository (ubuntu-latest, linked)	3m 39s
Multi-language repository (ubuntu-latest, stable-v2.19.4)	4m 21s
Multi-language repository (macos-latest, stable-v2.19.4)	12m 46s
Multi-language repository (macos-latest, linked)	11m 13s
Multi-language repository (macos-latest, default)	10m 11s
Multi-language repository (ubuntu-latest, stable-v2.18.4)	3m 57s
Multi-language repository (ubuntu-latest, nightly-latest)	3m 58s
	1h 56m 35s

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