[CVE RISK] Upgrade urllib3 to v1.26.5 (for opensearch-benchmark #378)

[AkshathRaghav]

Description

An issue was discovered in urllib3 before 1.26.5: when provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

Issues Resolved

This change increments the required urllib3 package in setup.py for that purpose.

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[codecov[bot]]

Codecov Report

Merging #515 (d833b65) into main (c6c7df5) will not change coverage. Report is 1 commits behind head on main. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #515   +/-   ##
=======================================
  Coverage   70.86%   70.86%           
=======================================
  Files          83       83           
  Lines        7796     7796           
=======================================
  Hits         5525     5525           
  Misses       2271     2271           

Files	Coverage Δ
opensearchpy/_async/client/tasks.py	64.28% <ø> (ø)
opensearchpy/client/tasks.py	85.71% <ø> (ø)

[dblock]

Looks like this PR brought it another unintended change with client generation.

@AkshathRaghav you should work on branches, seeing that you work off main I think you'll need to rewind it without loosing your changes - this post may be helpful