TMP: use head of spack-packages develop

Author: andrewdnolan

mache/spack/config.cfg

@@ -12,8 +12,9 @@ remote = https://github.com/spack/spack-packages.git
 # the tag OR branch OR commit to checkout the spack/spack-packages repo out at.
 # Only ONE of the three can be used a time.
 tag
-branch
-commit = 5bb9d2cbbcfedd4728d6c1457efbe68be3c61d7b
+branch = develop
+commit
+#commit = 5bb9d2cbbcfedd4728d6c1457efbe68be3c61d7b
 
 [e3sm_spack_packages]
 # this must be a https url and the double back slash must be escaped