Use today's date as Metabase "built on" date

bin/version

 #!/usr/bin/env bash
 
-VERSION="v0.17.0"
+VERSION="v0.17.1"
 
 # dynamically pull more interesting stuff from latest git commit
 HASH=$(git show-ref --head --hash=7 head)            # first 7 letters of hash should be enough; that's what GitHub uses
 BRANCH=$(git rev-parse --abbrev-ref HEAD)
-DATE=$(git log -1 --pretty=%ad --date=short)
+DATE=$(date --rfc-3339=date)
 
 
 # Return the version string used to describe this version of Metabase.