Bump django from 2.2.20 to 2.2.28 in /transifex/requirements

[dependabot]

Bumps django from 2.2.20 to 2.2.28.

Commits

• 5c33000 [2.2.x] Bumped version for 2.2.28 release.
• 29a6c98 [2.2.x] Fixed CVE-2022-28347 -- Protected QuerySet.explain(**options) against...
• 2c09e68 [2.2.x] Fixed CVE-2022-28346 -- Protected QuerySet.annotate(), aggregate(), a...
• 8352b98 [2.2.x] Added stub release notes for 2.2.28.
• 2801f29 [2.2.x] Reverted "Fixed forms_tests.tests.test_renderers with Jinja 3.1.0+."
• e03648f [2.2.x] Fixed forms_tests.tests.test_renderers with Jinja 3.1.0+.
• 9d13d8c [2.2.x] Fixed typo in release notes.
• 047ece3 [2.2.x] Added CVE-2022-22818 and CVE-2022-23833 to security archive.
• 2427b2f [2.2.x] Post-release version bump.
• e541f2d [2.2.x] Bumped version for 2.2.27 release.
• Additional commits viewable in compare view

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[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version.

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