Add explicit CONTACT to History

[mathomp4]

Due to a request from NOAA, in an upcoming version of MAPL, the default Contact: normally inserted into History output will change from http://gmao.gsfc.nasa.gov to a blank string.

In order to keep history metadata the same, this PR adds:

CONTACT: 'http://gmao.gsfc.nasa.gov'

to all HISTORY files in this repo.

Note that this is a no-op as this just overrides the default Contact: in the History output to be the current default.

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Files changed by:

$ sed -e "/^ *COLLEC/i CONTACT: 'http://gmao.gsfc.nasa.gov'\n" -i HIST*

[mathomp4]

Note to @sdrabenh: MAPL 2.28 is now out with this change to CONTACT. I'll make a PR in GEOSgcm for this and note we need this PR as well at the same time for complete metadata zero-diff.