Fix references and typos in documentation

[shreyas3156]

📝 Description

Type: 📝 documentation

• Fixes a typo in the Physics Walkthrough Intro doc.
• Changed the velocity subscript in the 'Model' notebook.
• Fixes a few grammatical errors.
• Corrects the reference to Energy Packet Initialization doc in Line Interaction Treatments (which was earlier referring to some Python package).

📌 Resources

Examples, notebooks, and links to useful references.

🚦 Testing

How did you test these changes?

• Testing pipeline
• Other method (describe)
• My changes can't be tested (explain why)

☑️ Checklist

• I requested two reviewers for this pull request
• I updated the documentation according to my changes
• I built the documentation by applying the build_docs label

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[andrewfullard]

Nice PR, though the gamma-ray documentation notebook is pre-run because it currently cannot be run as part of the documentation action workflow

[shreyas3156]

Nice PR, though the gamma-ray documentation notebook is pre-run because it currently cannot be run as part of the documentation action workflow

Thanks for the review. Shall I remove the commit with the change in the gamma-ray notebook?

[codecov]

Codecov Report

Merging #2224 (016d6a4) into master (24338e3) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 016d6a4 differs from pull request most recent head 56aaebf. Consider uploading reports for the commit 56aaebf to get more accurate results

@@           Coverage Diff           @@
##           master    #2224   +/-   ##
=======================================
  Coverage   71.81%   71.82%           
=======================================
  Files         133      133           
  Lines       12355    12358    +3     
=======================================
+ Hits         8873     8876    +3     
  Misses       3482     3482           

Impacted Files	Coverage Δ
tardis/analysis.py	32.40% <ø> (ø)
tardis/base.py	75.00% <ø> (ø)
tardis/montecarlo/montecarlo_numba/base.py	32.50% <100.00%> (+0.56%)	⬆️
tardis/util/base.py	74.20% <100.00%> (+0.20%)	⬆️

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[shreyas3156]

@andrewfullard @smithis7 I have removed the commit with the path-correction in gamma-ray notebook and added a few other commits.

[isaacgsmith]

The docs don't seem to be building on GitHub, I'm not sure why. I want to take a look at the built docs before approving, but it looks very good.

[shreyas3156]

The docs don't seem to be building on GitHub, I'm not sure why. I want to take a look at the built docs before approving, but it looks very good.

Sure! We can try it out once the build-docs issue is fixed.