Fix yaml indention of GCS secretName

What does this MR do?

Fix the indention of the runners.cache.secretName key.

Why was this MR needed?

I copied it blindly and the cache didn't work because of this.

What's the best way to test this MR?

Deploy Gitlab runner with GCS cache and config copied from the relevant docs section.

It would be good if the yaml parser would have caught this when trying to parse invalid data. That is something that should be fixed imo.

@kate_stack11

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added Community contribution label

Hi @gitlab-com/runner-docs-maintainers, please review this documentation Merge Request.

I'll pick this up; it's a small change and one I am comfortable approving.

added documentation twtriaged labels

Sorry my account isn't verified via debit card and this is my work account, so I won't verify it. This change doesn't affect anything that could break, so the pipelines are irrelevant anyway.

@kate_stack11 No worries about the verification. I'm running the pipelines for you now. It should be innocuous as long as the commit message is correctly formatted. I'll set this work to merge when the pipeline succeeds.

assigned to @kate_stack11

requested review from @aqualls

added devopsverify docsfix grouprunner tw-weight1 twfinished labels and removed twtriaged label

changed milestone to %14.4

approved this merge request

started a merge train

removed this merge request from the merge train

started a merge train

merged

mentioned in commit 31818db8

Thanks @aqualls !

added typemaintenance label

added Technical Writing label

added sectionops label