Update dependency androidx.compose.foundation:foundation to v1.6.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
androidx.compose.foundation:foundation (source)	1.4.0 -> 1.6.8

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Snapshot diff report

File name	Image
manual_view_first_sc reen_with_query_comp ose_compare.png
manual_view_first_sc reen_with_query_comp ose_custom_compare.p ng
com.github.takahirom .roborazzi.sample.Co mposeTest.roundTrans parentResizeCompose_ 2_compare.png
manual_view_first_sc reen_with_query_view _compare.png
com.github.takahirom .roborazzi.sample.Wi ndowCaptureTest.comp oseDialog_compare.pn g
com.github.takahirom .roborazzi.sample.Co mposeTest.wearCompos able_compare.png
com.github.takahirom .roborazzi.sample.Wi ndowCaptureTest.comp oseBottomSheet_compa re.png
com.github.takahirom .roborazzi.sample.Co mposeTest.wearCompos able_2_compare.png
com.github.takahirom .roborazzi.sample.Wi ndowCaptureTest.dump _compare.png
com.github.takahirom .roborazzi.sample.Wi ndowCaptureTest.andr oidDialog_compare.pn g
com.github.takahirom .roborazzi.sample.Wi ndowCaptureTest.noDi alog_compare.png
com.github.takahirom .roborazzi.sample.Co mposeTest.roundTrans parentResizeCompose_ compare.png