Add section: Lebesgue-Stieltjes measure of cdf

[Yosuke-Ito-345]

Motivation for this change

I add Section lebesgue_stieltjes_measure_of_cdf in probability.v, which proves that the Lebesgue-Stieltjes measure of a cumulative distribution function reduces to the underlying probability measure.

Checklist

• added corresponding entries in CHANGELOG_UNRELEASED.md

• added corresponding documentation in the headers

Reference: How to document

Merge policy

As a rule of thumb:

• PRs with several commits that make sense individually and that
  all compile are preferentially merged into master.
• PRs with disorganized commits are very likely to be squash-rebased.

Reminder to reviewers

• Read this Checklist
• Put a milestone if possible
• Check labels

[Yosuke-Ito-345]

These errors may be almost the same as #1686.
I am not sure with the error of the hierarchy-builder, but I think it originates from the plugin itself.