Update chocolatey to latest version

[dliappis]

Proposed commit message

This commit ensures that chocolatey is the latest version before installing Python on the Jenkins Windows workers. It fixes errors due to outdated chocolatey versions looking like:

Failures
  - python (exited 1) - python not installed. An error occurred during installation:
  Unable to resolve dependency 'python3 (= 3.8.5)'.

[mergify]

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @dliappis? 🙏.
For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v8./d.0 is the label to automatically backport to the 8./d branch. /d is the digit

[andrewkroh]

Thank you!

[elasticmachine]

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[pierrehilbert]

Force merging as we are in a deadlock situation and we need to merge one fix to get the other one green.