Fixing anchor link on /using-nhs-notify/nhs-app-templates #391

Job	Run time
Set CI/CD metadata	4s
Commit stage / Count lines of code	6s
Commit stage / Check English usage	4s
Commit stage / Check file format	3s
Commit stage / Check Markdown format	6s
Commit stage / Scan dependencies	22s
Commit stage / Lint Terraform	7s
Commit stage / Scan secrets	4s
Test stage	0s
Build stage	0s
Acceptance stage	0s
	56s

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