allows pinning version in poor_mans_cd.sh

[bayoumymac]

what

currently when runningpoor_mans_cd.sh, there is not a convenient way to rollback a version while continuing to use the safety benefits that comes with the script

this diff adds a new env var PINNED_VERSION that when present uses git reset to rollback to a specific hash and doesn't check for future updates

if the env var isn't set, script operates as usual

[rak16]

Looks like a fine short term solution so that people can continue using poor_mans_cd.sh but a relatively longer term solution would be to make the script pull only the signed releases – which shouldn't be that hard to do, would it? 🤔

[CassOnMars]

Closing as release_autorun.sh in the release branch now does strict versioning