packer: update to 1.15.4.

Author: thypon

srcpkgs/packer/template

@@ -1,6 +1,6 @@
 # Template file for 'packer'
 pkgname=packer
-version=1.15.3
+version=1.15.4
 revision=1
 build_style=go
 go_import_path="github.com/hashicorp/packer"
@@ -9,7 +9,7 @@ maintainer="Andrea Brancaleoni <abc@pompel.me>"
 license="BUSL-1.1"
 homepage="http://www.packer.io"
 distfiles="https://github.com/hashicorp/packer/archive/v${version}.tar.gz"
-checksum=69db1a7cb08b4766b0a397d864e23d0fbad348e26c82eabac6d6bdd9fb9d5bf5
+checksum=9423ab33d04e35d60087e61755398fb80aa30aa67dabd39febbfa81df6faf17f
 replaces="packer-bin>=0"
 repository=nonfree