Release 26.2.1

[hubertdeng123]

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• Release all components (replace items with publish repo issue links).
  • publish: getsentry/snuba@26.2.1 publish#7227
  • publish: getsentry/vroom@26.2.1 publish#7228
  • publish: getsentry/symbolicator@26.2.1 publish#7229
  • publish: getsentry/uptime-checker@26.2.1 publish#7230
  • publish: getsentry/taskbroker@26.2.1 publish#7231
  • publish: getsentry/relay@26.2.1 publish#7232
  • publish: getsentry/sentry@26.2.1 publish#7233
• Release self-hosted.
  • publish: getsentry/self-hosted@26.2.1 publish#7234
  • Check to make sure the new release branch in self-hosted includes the appropriate CalVer images.
  • Accept (publish) the release.
  • Edit release notes.
• Follow up.
  • Create the next release issue and link it from this one.
    • replace with link
  • Update the release issue template.
  • Create a PR to update relocation release tests to add the new version.
    • replace with link