Fix doi's for JOSS draft.

[MFraters]

Fixing issues on the bibtex found by the jossbot in openjournals/joss-reviews#6470.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.23%. Comparing base (1f5fe62) to head (8d6e55c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #700      +/-   ##
==========================================
- Coverage   98.24%   98.23%   -0.02%     
==========================================
  Files         107      107              
  Lines        7464     7464              
==========================================
- Hits         7333     7332       -1     
- Misses        131      132       +1     

see 3 files with indirect coverage changes

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[github-actions]

Benchmark	Main	Feature	Difference (99.9% CI)
Slab interpolation simple none	1.021 ± 0.004 (s=433)	1.021 ± 0.006 (s=451)	-0.1% .. +0.1%
Slab interpolation curved simple none	1.029 ± 0.005 (s=430)	1.023 ± 0.005 (s=450)	-0.8% .. -0.5%
Spherical slab interpolation simple none	1.171 ± 0.005 (s=373)	1.171 ± 0.006 (s=398)	-0.1% .. +0.1%
Slab interpolation simple curved CMS	1.064 ± 0.005 (s=408)	1.068 ± 0.004 (s=439)	+0.2% .. +0.4%
Spherical slab interpolation simple CMS	1.556 ± 0.009 (s=288)	1.555 ± 0.010 (s=293)	-0.2% .. +0.1%
Spherical fault interpolation simple none	1.236 ± 0.107 (s=364)	1.236 ± 0.107 (s=367)	-2.1% .. +2.2%
Cartesian min max surface	2.311 ± 0.021 (s=184)	2.310 ± 0.022 (s=208)	-0.3% .. +0.3%
Spherical min max surface	7.228 ± 0.038 (s=57)	7.220 ± 0.026 (s=70)	-0.4% .. +0.2%