Update type-check CI to include literate specs

[mccleeary-galois]

Summary

Type-check CI currently does not check literate specs only .cry files.

https://github.com/GaloisInc/cryptol-specs/blob/master/scripts/load_all_cry_files.sh#L19

Note that not all .md and .tex files are literate cryptol.

Acceptance Criteria

Update CI to check literate specs as well.

Do

• define acceptance criteria
• add appropriate labels
• remember to update CHANGES
• remember to update docs appropriately
• CI properly type checks literate specs as well

[WeeknightMVP]

Cryptol fails to load the following Markdown files, which have unlabeled code fences containing non-Cryptol:

Primitive/Asymmetric/KEM/ML_KEM/README.md
Primitive/Asymmetric/Signature/Dilithium/README.md
Primitive/Asymmetric/Signature/FALCON/1.2/README.md
Primitive/Asymmetric/Signature/SphincsPlus/README.md

Adding an info string such as ```console (or anything not starting with ```cryptol) would render them loadable (as non-modules adding no definitions) by the Cryptol REPL or Remote API.