HBASE-27880 Bump requests from 2.28.1 to 2.31.0 in /dev-support/flaky…

…-tests (apache#5250)

Bumps [requests](https://github.com/psf/requests) from 2.28.1 to 2.31.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.28.1...v2.31.0)

Change-Id: I40482817deeec2703a529002801cde766ff30556

---
updated-dependencies:
- dependency-name: requests
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Signed-off-by: Duo Zhang <zhangduo@apache.org>
(cherry picked from commit 22526a6)
(cherry picked from commit 6aeaaa1)
(cherry picked from commit c34dc76)

Change-Id: I40482817deeec2703a529002801cde766ff30556

dev-support/python-requirements.txt

@@ -15,7 +15,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-requests==2.28.1
+requests==2.31.0
 future==0.18.3
 gitpython==3.1.30
 rbtools==4.0