fix: nexted prefix order with inline

[hori-ryota]

Description

Fix nested prefix order.

	type Owner struct {
		Name string `csv:"name"`
	}

	type Address struct {
		Owner  Owner  `csv:"owner_,inline"`
	}

	type User struct {
		Address     Address `csv:"address,inline"`
	}

got owner_address_name; want address_owner_name

Checklist

• Code compiles without errors
• Added new tests for the provided functionality
• All tests are passing
• Updated the README and/or documentation, if necessary

[jszwec]

nice catch! looks good to me, thanks!

[jszwec]

released v1.7.1 with this patch