Update kong-detect.yaml

False Positive Before:
`[2021-05-04 18:16:57] [kong-detect] [http] [info] https://hongkong.reddit.com:443 [Location: https://www.reddit.com/r/hongkong/]`

After:
`[INF] No results found. Better luck next time!`

Actual Kong server:
`[2021-05-04 18:22:52] [kong-detect] [http] [info] https://xxx.xxx.xxx.xxx/ [kong/2.0.5]`

technologies/kong-detect.yaml

@@ -16,10 +16,10 @@ requests:
       - type: regex
         part: header
         regex:
-          - kong+
+          - "[Ss]erver: [Kk]ong+"
 
     extractors:
-      - type: regex
+      - type: kval
         part: header
-        regex:
-          - .*kong.*
+        kval:
+          - server