Fixed typo in UPGRADE-2.2
merged branch WouterJ/patch-1 (PR #7284)

This PR was merged into the 2.2 branch.

Commits
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ac0c4ce Fixed typo in UPGRADE-2.2

Discussion
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Fixed typos in UPGRADE-2.2

| Q             | A
| ------------- | ---
| Fixed tickets | -
| License       | MIT