Add autoformatter for rst

[MKastek]

• I have added a changelog entry for this pull request.

• If adding new functionality, I have added tests and
  docstrings.

• I have fixed any newly failing tests.

Closes #1669

[MKastek]

pre-commit.ci autofix

[codecov]

Codecov Report

Merging #1708 (cba15f1) into main (9ef6671) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1708      +/-   ##
==========================================
+ Coverage   97.63%   97.67%   +0.04%     
==========================================
  Files          85       87       +2     
  Lines        8020     8204     +184     
==========================================
+ Hits         7830     8013     +183     
- Misses        190      191       +1     

Impacted Files	Coverage Δ
plasmapy/formulary/relativity.py	99.21% <0.00%> (-0.79%)	⬇️
plasmapy/particles/particle_collections.py	99.16% <0.00%> (-0.06%)	⬇️
plasmapy/particles/ionization_state.py	94.04% <0.00%> (-0.02%)	⬇️
plasmapy/particles/atomic.py	100.00% <0.00%> (ø)
plasmapy/particles/__init__.py	95.83% <0.00%> (ø)
plasmapy/particles/_factory.py	100.00% <0.00%> (ø)
plasmapy/utils/data/__init__.py	100.00% <0.00%> (ø)
plasmapy/utils/data/downloader.py	100.00% <0.00%> (ø)
plasmapy/formulary/collisions.py	99.61% <0.00%> (+0.11%)	⬆️

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[MKastek]

pre-commit.ci autofix

[MKastek]

pre-commit.ci autofix

[MKastek]

pre-commit.ci autofix

[MKastek]

pre-commit.ci autofix