message: util: improves error messages on get_previous_releases script
  If a requested version doesn't exist on our list of checksums it says it cannot do a checksum comparision instead of saying it did not match
diff: @@ -112,8 +112,12 @@ def download_binary(tag, args) -> int:
  tarballHash = hasher.hexdigest()
  if tarballHash not in SHA256_SUMS or SHA256_SUMS[tarballHash] != tarball:
  + if tarball in SHA256_SUMS.values():
  print("Checksum did not match")
  return 1
  +
  + print("Checksum for given version doesn't exist")
  + return 1
  print("Checksum matched")
  # Extract tarball
  