[develop]: Update SRW/physics FAQ

[gspetro-NOAA]

DESCRIPTION OF CHANGES:

@ligiabernardet requested some changes to one of our FAQs. The changes were vetted in this document. The update can be viewed in human-friendly form on RTD: https://srw-ug.readthedocs.io/en/text-faq/Reference/FAQ.html#addphys

Type of change

• This change requires a documentation update

TESTS CONDUCTED:

None required. Text-only changes.

• hera.intel
• orion.intel
• cheyenne.intel
• cheyenne.gnu
• gaea.intel
• jet.intel
• wcoss2.intel
• NOAA Cloud (indicate which platform)
• Jenkins
• fundamental test suite
• comprehensive tests (specify which if a subset was used)

DEPENDENCIES:

N/A.

DOCUMENTATION:

All documention! :)

ISSUE:

Issue #927

CHECKLIST

• My code follows the style guidelines in the Contributor's Guide
• I have performed a self-review of my own code using the Code Reviewer's Guide
• I have commented my code, particularly in hard-to-understand areas (N/A)
• My changes need updates to the documentation. I have made corresponding changes to the documentation
• My changes do not require updates to the documentation (explain).
• My changes generate no new warnings
• New and existing tests pass with my changes (N/A)
• Any dependent changes have been merged and published

[natalie-perlin]

Fair update to the instructions, following a discussion with @ligiabernardet , and to warn users to be aware on possible issues with untested combinations. Approving.

[MichaelLueken]

@gspetro-NOAA - These changes look good to me! It is very nice to see the addition of creating a GitHub Discussion in the SRW App repository, as well as the CCPP repositories, if users have questions or concerns about adding a new physics scheme.

Given the discussion between you and @ligiabernardet on these changes, I am giving my approval for these changes.