Add basis to conc example on property naming conventions docs

[kurbansitterley]

Fixes #1481

Add basis to conc example on property naming conventions docs page.
see #1481

Summary/Motivation:

Concentration needs a basis (mass, mol, etc) to be a valid property name but was not included in the docs example.

Changes proposed in this PR:

• Add basis to conc example on property naming conventions docs page.

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[dangunter]

spelling issue is due to an update in typos.

[lbianchi-lbl]

@lbianchi-lbl Do you know why the spell checker would fail on a DMF file, which certainly wasn't altered by this PR?

The first reason that comes to mind is that a new version of the spellchecker was released, with new typos being added, which would cause typos that used to be ignored with previous versions to be flagged instead.

This is a consequence of the typos package version being unpinned. This was a conscious decision we took being aware that it would result in occasional failures in unrelated PRs, but I've been thinking about reconsidering this and make the version update (and therefore the possibility of new typos being flagged) be "opt-in" instead.

TL;DR New version of spellchecker flags new typos that were already present in the codebase.

[bpaul4]

@lbianchi-lbl @dangunter we could pin between releases, and on each release cycle update the version and fix any flagged typos. Might be a "best of both worlds" approach so PRs don't fail when typos pushes a new version.

[andrewlee94]

As you noted in the associated issue, there are a few others here that need to be updated with a baisis. Would you be able to update the following

enth to enth_mol
flow to flow_vol
entr_phase['Liq'] to entr_mol_phase['Liq']

(I chose a variety of bases to demonstrate their uses).

[andrewlee94]

Thank you for noting this - this is important for understanding the naming convention and was definitively wrong (and thus misleading).

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.36%. Comparing base (8140a3d) to head (8b93059).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1482      +/-   ##
==========================================
- Coverage   76.37%   76.36%   -0.01%     
==========================================
  Files         393      393              
  Lines       65086    65086              
  Branches    14426    14426              
==========================================
- Hits        49708    49705       -3     
- Misses      12816    12820       +4     
+ Partials     2562     2561       -1     

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