Update block-content-categories.mdx - Replacing DNS with HTTP (cloudflare#25502)

Author: caley-b

src/content/partials/cloudflare-one/gateway/policies/dash-plus-api/http/block-content-categories.mdx

@@ -42,7 +42,7 @@ resource "cloudflare_zero_trust_gateway_policy" "block_unauthorized_apps" {
 	precedence     = 40
   enabled        = true
   action         = "block"
-  filters        = ["dns"]
+  filters        = ["http"]
   traffic        = "any(http.request.uri.content_category[*] in {17 85 87 102 157 135 138 180 162 32 169 177 128 15 115 119 124 141 161 2 67 125 133 99})""
   identity       = ""
   device_posture = ""