ci: Update all GitHub Actions to latest versions and enable Dependabot #2893

Job	Run time
Determine whether this issue comment was on a pull request from a fork	0s
React to the comment	0s
Prepare dependencies	0s
Deduplicate yarn.lock	0s
Build packages	0s
Update examples	0s
Regenerate LavaMoat policies	0s
Commit result	-1s
	-1s

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