ci: pin action versions

12 jobs for development in 15 seconds (queued for 9 seconds)
Name Stage Failure
extract-source Provisioning
gbp:info: Found detached head at '03a0d32d251e1de344da1e1eaae5e928da1b44ed'
gbp:warning: Skipping non-fast forward of 'master' - use --force or update manually
gbp:info: Branch 'upstream' is already up to date.
Uploading artifacts for failed job
Uploading artifacts...
/builds/debian/dns-flood-detector/debian/output/: found 1 matching files and directories

Uploading artifacts as "archive" to coordinator... ok
id=626 responseStatus=201 Created token=J445xnup
Cleaning up file based variables
ERROR: Job failed: exit code 1