Update intro-upgrade-from-v1.md
Merge pull request #4523 from littlefuntik/patch-1

Update intro-upgrade-from-v1.md
Fixes #4497: Bad Request, Unable to verify your data submission
Update translation-teams.md
Merge pull request #4524 from mbman/bugfix-4497

Fixes #4497: Bad Request, Unable to verify your data submission
Enh #4520: yii\caching/MemCache.php add sasl support (xjflyttp)