Update validity metric doc to match example

[Zack Shainsky]

Issue

The Validity Metrics doc has a typo where an example does not fit the description provided explaining that example.

Documentation Link

• Code:

  docs/soda-cl/validity-metrics.md

  Line 121 in f65b6da

   The example below defines two checks. The first check applies to the column `house_owner_flag`. The `valid values` configuration key specifies that if a row in that column contains *anything other than* the two valid values in the list, Soda registers them as invalid. The check fails if Soda discovers more than five values that are not `0` or `1`.  

• Web: https://docs.soda.io/soda-cl/validity-metrics.html#specify-valid-or-invalid-values

Existing example and description:

Soda registers them as invalid. The check fails if Soda discovers more than five values that are not 0 or 1.

checks for dim_customer:
  - invalid_count(house_owner_flag) = 0:
      valid values: ['0', '1']

Suggested Change

The description should read:
Soda registers them as invalid. The check fails if Soda discovers more than any value that are not 0 or 1.

[Janet R]

Thank you, @zshainsky!!