Co-authored-by: teselil <tzlil@datree.com>

Comparing two strings to the same case with `strings.ToLower` is more
computational expensive than `strings.EqualFold`.

Sample benchmark:

func BenchmarkToLower(b *testing.B) {
	for i := 0; i < b.N; i++ {
		if strings.ToLower("CONTENT-TYPE") != strings.ToLower("content-type") {
			b.Fail()
		}
	}
}

func BenchmarkEqualFold(b *testing.B) {
	for i := 0; i < b.N; i++ {
		if !strings.EqualFold("CONTENT-TYPE", "content-type") {
			b.Fail()
		}
	}
}

goos: linux
goarch: amd64
pkg: github.com/datreeio/datree/pkg/httpClient
cpu: AMD Ryzen 7 PRO 4750U with Radeon Graphics
BenchmarkToLower-16      	 8183317	       192.1 ns/op	      16 B/op	       1 allocs/op
BenchmarkEqualFold-16    	82634701	        12.92 ns/op	       0 B/op	       0 allocs/op
PASS
ok  	github.com/datreeio/datree/pkg/httpClient	4.181s

Reference: https://staticcheck.dev/docs/checks/#SA6005

Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>