fix(ruby): tighten sql injection patterns #1500

Job	Run time
build (javascript/express)	2m 12s
build (javascript/hapi)	16s
build (javascript/lang)	3m 54s
build (javascript/node)	16s
build (javascript/react)	27s
build (javascript/third_parties)	2m 0s
build (ruby/lang)	4m 12s
build (ruby/rails)	1m 40s
build (ruby/third_parties)	3m 28s
build (java/lang)	3m 3s
build (java/spring)	30s
build (java/android)	13s
build (java/third_parties)	30s
build (php/lang)	5m 4s
build (php/symfony)	55s
build (php/third_parties)	1m 7s
build (python/django)	50s
build (python/lang)	1m 51s
build (python/third_parties)	39s
build (go/lang)	1m 1s
build (go/gosec)	2m 12s
build (go/gorilla)	13s
build (go/third_parties)	38s
	37m 11s

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