docs: Fix typo in `core/src/services/http/docs.md` (#4226) #116

Job	Run time
build_default_features (ubuntu-latest)	1m 6s
build_default_features (macos-latest)	1m 57s
check_clippy	4m 4s
build_default_features (windows-latest)	2m 18s
check_docs	3m 10s
check_msrv	3m 48s
build_all_features	5m 14s
build_all_platforms (ubuntu-latest)	2m 23s
build_under_wasm	54s
build_all_platforms (macos-latest)	4m 46s
unit	3m 28s
build_all_platforms (windows-latest)	5m 13s
	38m 21s

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