Fix example for GcsWriteFolder with trailing slash

[quassy]

Must end with a slash.

Fix the example to fit the help text.

[github-actions]

This pull request has been marked as stale due to 180 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time. Thank you for your contributions.

[quassy]

This is incorrect, the given example without a trailing dash is wrong per description of the function.

[github-actions]

This pull request has been marked as stale due to 180 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time. Thank you for your contributions.

[quassy]

This is incorrect, the given example without a trailing dash is wrong per description of the function.

[github-actions]

This pull request has been marked as stale due to 180 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time. Thank you for your contributions.

[quassy]

This is incorrect, the given example without a trailing dash is wrong per description of the function.

[github-actions]

This pull request has been marked as stale due to 180 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time. Thank you for your contributions.

[quassy]

This is incorrect, the given example without a trailing dash is wrong per description of the function.

[derrickaw]

Reopen if still valid.

[quassy]

@derrickaw Still valid, I have opened #3997 as a follow-up.