Fixed typo in 1 Horse Guards Road description #1050

Job	Run time
Lint Ruby / Run RuboCop	15s
Lint JavaScript / Run Standardx	14s
Lint SCSS / Run Stylelint	20s
Security Analysis / Run Brakeman	10s
Test JavaScript / Run Jasmine	1m 5s
Test Ruby / Run Minitest	4m 46s
	6m 50s

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