Minor typo in hydrology tech note

[samsrabin]

Brief summary of bug

In Sect. 2.7.5:

... finding the irst soil layer ...

General bug information

CTSM version you are using: ctsm5.4.006

Does this bug cause significantly incorrect results in the model's science? No

Configurations affected: n/a

[slevis-lmwg]

This issue seems resolved, so I'm closing.

[samsrabin]

It's not; see https://escomp.github.io/CTSM/release-clm5.0/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.html#lateral-sub-surface-runoff:~:text=by%20finding%20the-,irst,-soil%20layer%20above