Use 'GeoIP'/'GeoLite' branding in documentation and prose

MaxMind no longer ships the legacy products, so refer to the products as
'GeoIP' and 'GeoLite' rather than 'GeoIP2'/'GeoLite2' in prose. Technical
identifiers (tool/binary names, edition IDs, filenames, env vars, URLs)
are unchanged.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: oschwald

README.md

@@ -1,15 +1,15 @@
 # About
 
 The libmaxminddb library provides a C library for reading MaxMind DB files,
-including the GeoIP2 databases from MaxMind. This is a custom binary format
+including the GeoIP databases from MaxMind. This is a custom binary format
 designed to facilitate fast lookups of IP addresses while allowing for great
 flexibility in the type of data associated with an address.
 
 The MaxMind DB format is an open format. The spec is available at
 https://maxmind.github.io/MaxMind-DB/. This spec is licensed under the Creative
 Commons Attribution-ShareAlike 3.0 Unported License.
 
-See https://dev.maxmind.com/ for more details about MaxMind's GeoIP2 products.
+See https://dev.maxmind.com/ for more details about MaxMind's GeoIP products.
 
 # License