fix(data): update InterPals absence string to match current site response (#2442)

The previous absence string 'The requested user does not exist or is inactive'
no longer matches the live site response. InterPals now returns 'User not found'
for non-existent profiles, causing false positives for all username searches.

Tested against interpals.net/noneownsthisusername (non-existent) and
interpals.net/blue (claimed) to confirm detection accuracy.

Closes #2433

Co-authored-by: Julio César Suástegui <juliosuas@users.noreply.github.com>

maigret/resources/data.json

@@ -13655,7 +13655,7 @@
             ],
             "checkType": "message",
             "absenceStrs": [
-                "The requested user does not exist or is inactive"
+                "User not found"
             ],
             "alexaRank": 46998,
             "urlMain": "https://www.interpals.net/",
@@ -29285,6 +29285,7 @@
             "usernameClaimed": "alex",
             "usernameUnclaimed": "noonewouldeverusethis7"
         },
+
         "izmailonline.com": {
             "tags": [
                 "ua"