Expect ::/64 from the no-IPv4-search-tree database

The database stores its single record as the string form of that
record's own network. MaxMind-DB regenerated the test databases with
its Go writer, which renders the network as ::/64 where the previous
Perl writer produced ::0/64.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: horgh

tests/reader_test.py

@@ -152,19 +152,19 @@ def test_get_with_prefix_len(self) -> None:
                 "ip": "200.0.2.1",
                 "file_name": "MaxMind-DB-no-ipv4-search-tree.mmdb",
                 "expected_prefix_len": 0,
-                "expected_record": "::0/64",
+                "expected_record": "::/64",
             },
             {
                 "ip": "::200.0.2.1",
                 "file_name": "MaxMind-DB-no-ipv4-search-tree.mmdb",
                 "expected_prefix_len": 64,
-                "expected_record": "::0/64",
+                "expected_record": "::/64",
             },
             {
                 "ip": "0:0:0:0:ffff:ffff:ffff:ffff",
                 "file_name": "MaxMind-DB-no-ipv4-search-tree.mmdb",
                 "expected_prefix_len": 64,
-                "expected_record": "::0/64",
+                "expected_record": "::/64",
             },
             {
                 "ip": "ef00::",
@@ -294,8 +294,8 @@ def test_no_ipv4_search_tree(self) -> None:
             self.mode,
         )
 
-        self.assertEqual(reader.get(self.ipf("1.1.1.1")), "::0/64")
-        self.assertEqual(reader.get(self.ipf("192.1.1.1")), "::0/64")
+        self.assertEqual(reader.get(self.ipf("1.1.1.1")), "::/64")
+        self.assertEqual(reader.get(self.ipf("192.1.1.1")), "::/64")
         reader.close()
 
     def test_ipv6_address_in_ipv4_database(self) -> None: