[data] update searx.data - update_wikidata_units.py (#4956)

Co-authored-by: searxng-bot <searxng-bot@users.noreply.github.com>

searx/data/wikidata_units.json

@@ -5334,6 +5334,11 @@
         "symbol": "km³",
         "to_si_factor": 1000000000.0
     },
+    "Q4313172": {
+        "si_name": null,
+        "symbol": "nhp",
+        "to_si_factor": null
+    },
     "Q4406": {
         "si_name": null,
         "symbol": "$T",