Release 2.1.3 docs

[bjee19]

Update docs for 2.1.3 release.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.91%. Comparing base (43d6a98) to head (8f33979).
⚠️ Report is 1 commits behind head on release-2.1.

Additional details and impacted files

@@ Coverage Diff @@ ## release-2.1 #3988 +/- ## =============================================== + Coverage 86.87% 86.91% +0.03%  =============================================== Files 128 128 Lines 16059 16059 Branches 62 62 =============================================== + Hits 13952 13957 +5  + Misses 1935 1931 -4  + Partials 172 171 -1 

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