docs: add kshedden as a contributor for doc, and code

[allcontributors[bot]]

Adds @kshedden as a contributor for doc, code.

This was requested by RaphaelS1 in this comment

[skip ci]

[RaphaelS1]

@kshedden please confirm you're happy for your handle/picture to be listed on the readme as a contributor.

[codecov-commenter]

Codecov Report

Base: 99.84% // Head: 99.84% // No change to project coverage :thumbsup:

Coverage data is based on head (82ec819) compared to base (0c7c52d). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #87   +/-   ##
=======================================
  Coverage   99.84%   99.84%           
=======================================
  Files          10       10           
  Lines         633      633           
=======================================
  Hits          632      632           
  Misses          1        1           

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[RaphaelS1]

@kshedden as I haven't heard from you I'll close this PR. If you want your name on the software please let me know and I'll reopen this

[kshedden]

Sorry I missed this. I'm fine either way. I will be submitting additional PR's in the future.