resolve issue #103: Example 1.7 typo

[linniahawkins]

Description of changes

Fix typo in users_guide/setting-up-and-running-a-case/customizing-the-clm-namelist.rst

hist_type2d_pertape : hist_type1d_pertape

as per Issue #103

Specific notes

Contributors other than yourself, if any:

CTSM Issues Fixed (include github issue #):

• Resolves #103

Are answers expected to change (and if so in what way)? No.

Any User Interface Changes (namelist or namelist defaults changes)? No.

Does this create a need to change or add documentation? Did you do so? No.

Testing performed, if any: None. (List what testing you did to show your changes worked as expected) (This can be manual testing or running of the different test suites) (Documentation on system testing is here: https://github.com/ESCOMP/ctsm/wiki/System-Testing-Guide) (aux_clm on derecho for intel/gnu and izumi for intel/gnu/nag/nvhpc is the standard for tags on master)

NOTE: Be sure to check your coding style against the standard (https://github.com/ESCOMP/ctsm/wiki/CTSM-coding-guidelines) and review the list of common problems to watch out for (https://github.com/ESCOMP/CTSM/wiki/List-of-common-problems).

[samsrabin]

@ekluzek Assigning you to review because you were assigned on the original issue.

[ekluzek]

I'm just going to merge because it's so simple and safe.

[ekluzek]

@linniahawkins by the way -- I think this is your first PR to CTSM? Congratulations on getting one merged in? Good job, and thanks for the contribution.