v2.6.1: Fixes for start-stop regress and AMIP emissions

This configuration is for GEOSgcm v12

This release has fixes on v2.6.0. It fixes start-stop regression as well as a fix for runs using AMIP emissions.

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Fixed

• Fix missing GMI_HNO3 entry in AMIP/NI2G_GridComp_ExtData.yaml file
• Fix start-stop regression failure in SU GridComp

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What's Changed

• v2.6: Fix start-stop and missing GMI_HNO3 in NI AMIP ExtData yaml by @mathomp4 in #382

Full Changelog: v2.6.0...v2.6.1