release: Release opentelemetry-api 1.2.2

[github-actions]

This pull request prepares new gem releases for the following gems:

• opentelemetry-api 1.2.2 (was 1.2.1)

For each gem, this pull request modifies the gem version and provides an initial changelog entry based on conventional commit messages. You can edit these changes before merging, to release a different version or to alter the changelog text.

• To confirm this release, merge this pull request, ensuring the "release: pending" label is set. The release script will trigger automatically on merge.
• To abort this release, close this pull request without merging.

The generated changelog entries have been copied below:

---

opentelemetry-api

v1.2.2 / 2023-08-15

• FIXED: Patch the issue for frozen string on ruby < 3.0 with string interpolation
• FIXED: Performance regression in_span

[github-actions]

WARNING: An additional commit was added while this release PR was open.
You may need to add to the changelog, or close this PR and prepare a new one.

Commit link: 062f688

Message:
test: Skip flaky truffleruby test (#1512)

This test is failing on unrelated PRs. Issue #1507 is created to resolve
the source of the flakiness.

[github-actions]

Release PR closed without merging.