chore(main): release google-shopping-merchant-issue_resolution-v1beta 0.6.0 #109073

Job	Run time
CI (macos-latest, 4.0, --test)	48s
CI (ubuntu-latest, 3.3, --test)	1m 10s
CI (ubuntu-latest, 3.2, --test)	1m 11s
CI (ubuntu-latest, 3.4, --test)	1m 12s
CI (ubuntu-latest, 4.0, --test)	56s
CI (windows-latest, 4.0, --test)	3m 22s
CI (ubuntu-latest, 4.0, --rubocop-toplevel --rubocop --build --yard)	1m 26s
	10m 5s

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