Bug Report: Nimble animal companion doesnt give unarmored defense expert since changes with errataCRr3 however Wanderers Guide still adds unarmored defense expert

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Reported by: .fotl#0

Bug Name: “Nimble animal companion” doesnt give unarmored defense expert since changes with errata-CR-r3, however Wanderers Guide still adds unarmored defense expert. Operating System, Browser: Windows 10, Google Chrome Description: Your animal companion is mature. You select that your companion becomes nimble, which by the rules gives +2 Dexterity and doesn't change unarmored defense expert. With this change you expect that Armor Class (AC) get +2, instead it gets +4. This can only happen if unarmored defense (or/and barging) increased from trained to expert. It was true, that nimble animal companion got expert in unarmored defense before errata-CR-r3, now though its wrong.
Steps to Reproduce:

1. Create any character list level 1.
2. Get to Companions.
3. Add companion for example Crocodile.
4. Select that he is mature.
5. Look for companion`s stats and remember them. (image 1) Calculate his AC manually to check. Companions are trained in barging and unarmored defense, so AC is 10 + Dexterity(mature Crocodile (3)) + proficiency (trained(2) + level(1)) = 16
6. Select that companion is nimble.
7. Look for companion`s stats and calculate his AC manually to check.
   Expected Result: AC is 18. Calculations: 10 + Dexterity(nimble Crocodile (5)) + proficiency (trained(2) + level(1)) = 18
   Actual Result: AC is 20. (image 2) Which by my guess is because of proficiency become expert with calculations: 10 + Dexterity(nimble Crocodile (5)) + proficiency (expert(4) + level(1)) = 20
   Screenshots added (image 1, image 2)
   Extra Notes:
8. Nimble rules now: https://2e.aonprd.com/AnimalCompanions.aspx?ID=2&Advanced=true
9. Errata. Select Pathfinder Core Rulebook Errata (3rd Printing), changes at Page 214, 217. https://paizo.com/pathfinder/faq

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