docs: Update talk list through May 2023

[matthewfeickert]

Description

Update pyhf talk and tutorial list through May 2023.

Fix DESY Indico URL for 'Traditional inference with machine learning tools' to avoid timeout error during linkcheck.

Checklist Before Requesting Reviewer

• Tests are passing
• "WIP" removed from the title of the pull request
• Selected an Assignee for the PR to be responsible for the log summary

Before Merging

For the PR Assignees:

• Summarize commit messages into a comprehensive review of the PR

* Update pyhf talk and tutorial list through May 2023.
* Fix DESY Indico URL for 'Traditional inference with machine learning tools'
  to avoid timeout error during linkcheck.

[matthewfeickert]

Relevant RTD build: https://pyhf--2210.org.readthedocs.build/en/2210/outreach.html#presentations

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (2e7f2c0) 98.30% compared to head (21e27dd) 98.30%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2210   +/-   ##
=======================================
  Coverage   98.30%   98.30%           
=======================================
  Files          69       69           
  Lines        4533     4533           
  Branches      802      802           
=======================================
  Hits         4456     4456           
  Misses         45       45           
  Partials       32       32           

Flag	Coverage Δ
contrib	97.88% <ø> (ø)
doctest	61.08% <ø> (ø)
unittests-3.10	96.31% <ø> (ø)
unittests-3.11	96.31% <ø> (ø)
unittests-3.8	96.33% <ø> (ø)
unittests-3.9	96.36% <ø> (ø)

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[matthewfeickert]

I'm going to approve and merge this myself. As always, PRs approved by a single core dev can be reverted as needed by the rest of the dev team.