Bump go_router from 8.2.0 to 12.1.1 in /platform_channels#644

dependabot[bot] wants to merge 1 commit intomainfiliph/samples:mainfrom

dependabot/pub/platform_channels/go_router-12.1.1filiph/samples:dependabot/pub/platform_channels/go_router-12.1.1Copy head branch name to clipboard