Update dependency i18next to v21.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
i18next (source)	21.8.8 -> 21.9.0

---

Release Notes

i18next/i18next

v21.9.0

Compare Source

• Add Customizable Retry Logic 1810
• types: extend compatibilityJSON with v4

v21.8.16

Compare Source

• types: fix getDataByLanguage type 1810

v21.8.15

Compare Source

• fix: make sure retry logic ends for failed backend reads

v21.8.14

Compare Source

• allow overriding keyPrefix option t function returned from getFixedT (does not work for normal t function)

v21.8.13

Compare Source

• types: new optional unescape option for react-i18next

v21.8.12

Compare Source

• fix: respect pluralSeparator for special _zero handling

v21.8.11

Compare Source

• fix: types should always come first in exports 1796

v21.8.10

Compare Source

• types: fix loaded event result

v21.8.9

Compare Source

• fix: deepFind for null values 1790

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled due to failing status checks.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by Mend Renovate. View repository job log here.