SurvivalProbabilty Docs

[jaclark5]

Fixes #4247

Changes made in this Pull Request:

• Updated docs for SurvivalProbabilty function.

PR Checklist

• [NA] Tests?
• Docs?
• CHANGELOG updated?
• Issue raised/referenced?

Developers certificate of origin

• I certify that this contribution is covered by the LGPLv2.1+ license as defined in our LICENSE and adheres to the Developer Certificate of Origin.

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📚 Documentation preview 📚: https://mdanalysis--4248.org.readthedocs.build/en/4248/

[github-actions]

Linter Bot Results:

Hi @jaclark5! Thanks for making this PR. We linted your code and found the following:

Some issues were found with the formatting of your code.

Code Location	Outcome
main package	⚠️ Possible failure
testsuite	✅ Passed

Please have a look at the darker-main-code and darker-test-code steps here for more details: https://github.com/MDAnalysis/mdanalysis/actions/runs/5884082397/job/15958077997

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Please note: The black linter is purely informational, you can safely ignore these outcomes if there are no flake8 failures!

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.01% 🎉

Comparison is base (acfd122) 93.40% compared to head (c5ae4bd) 93.41%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4248      +/-   ##
===========================================
+ Coverage    93.40%   93.41%   +0.01%     
===========================================
  Files          169      183      +14     
  Lines        22204    23309    +1105     
  Branches      4064     4064              
===========================================
+ Hits         20740    21775    +1035     
- Misses         948     1018      +70     
  Partials       516      516              

Files Changed	Coverage Δ
package/MDAnalysis/analysis/waterdynamics.py	93.01% <ø> (ø)

... and 14 files with indirect coverage changes

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[hmacdope]

Thanks for this @jaclark5, much better with the ensemble average marked clearly. :)