Remove flow exectue as async function from changelog

[crazygao]

Description

Please add an informative description that covers that changes made by the pull request and link all relevant issues.

All Promptflow Contribution checklist:

• The pull request does not introduce [breaking changes].
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.
• Create an issue and link to the pull request to get dedicated review from promptflow team. Learn more: suggested workflow.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[github-actions]

SDK CLI Global Config Test Result yigao/changelog_hide_asyncfunc

2 tests   2 ✅  55s ⏱️
1 suites  0 💤
1 files    0 ❌

Results for commit f1444be.

[github-actions]

promptflow-tracing unit test result yigao/changelog_hide_asyncfunc

 4 files   4 suites   22s ⏱️
 4 tests  4 ✅ 0 💤 0 ❌
16 runs  16 ✅ 0 💤 0 ❌

Results for commit f1444be.

[github-actions]

promptflow-tracing e2e test result yigao/changelog_hide_asyncfunc

 4 files   4 suites   1m 41s ⏱️
 8 tests  8 ✅ 0 💤 0 ❌
32 runs  32 ✅ 0 💤 0 ❌

Results for commit f1444be.

[github-actions]

Executor Unit Test Result yigao/changelog_hide_asyncfunc

754 tests   754 ✅  51s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit f1444be.

[github-actions]

promptflow SDK CLI Azure E2E Test Result yigao/changelog_hide_asyncfunc

  4 files    4 suites   3m 47s ⏱️
168 tests 149 ✅ 19 💤 0 ❌
672 runs  596 ✅ 76 💤 0 ❌

Results for commit f1444be.

[github-actions]

Executor E2E Test Result yigao/changelog_hide_asyncfunc

211 tests   209 ✅  6m 32s ⏱️
  1 suites    2 💤
  1 files      0 ❌

Results for commit f1444be.

[github-actions]

SDK CLI Test Result yigao/changelog_hide_asyncfunc

   12 files     12 suites   41m 58s ⏱️
  451 tests   434 ✅ 17 💤 0 ❌
1 804 runs  1 736 ✅ 68 💤 0 ❌

Results for commit f1444be.