chore: add geolocation databases license caption (open-telemetry#37141)

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#### Description

The use and/or administration of geolocation databases might involve
compiling with vendors licensing, this PR adds some words into the
`geoIP` processor as a reminder.

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Fixes

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#### Testing

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#### Documentation

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processor/geoipprocessor/internal/provider/maxmindprovider/README.md

@@ -1,5 +1,7 @@
 # MaxMind GeoIP Provider
 
+> Use of MaxMind and other geolocation databases are subject to applicable licenses and terms governing the databases. Consult the database provider for the latest applicable terms.
+
 This package provides a MaxMind GeoIP provider for use with the OpenTelemetry GeoIP processor. It leverages the [geoip2-golang package](https://github.com/oschwald/geoip2-golang) to query geographical information associated with IP addresses from MaxMind databases. See recommended clients: https://dev.maxmind.com/geoip/docs/databases#api-clients
 
 # Features