Update module github.com/oschwald/geoip2-golang to v1.9.0

This MR contains the following updates:

Package	Type	Update	Change
github.com/oschwald/geoip2-golang	require	minor	v1.8.0 -> v1.9.0

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Release Notes

oschwald/geoip2-golang (github.com/oschwald/geoip2-golang)

v1.9.0: 1.9.0

Compare Source

• Rearrange fields in structs to reduce memory usage. Although this does reduce readability, these structs are often created at very rates, making the trade-off worth it.

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