Add notes about recent changes on KnotInfo

[soehms]

📚 Description

This is a follow up of #33969, which used the Khovanov polynomial KnotInfo data in a new conversion method. Unfortunately, this data has since been removed from the website (but not from the database).

This PR merely adds appropriate notes to the documentation of the KnotInfo interface module.

Since the missing data may cause confusion, it would be great if the notes will be included in release 9.8.

📝 Checklist

• I have made sure that the title is self-explanatory and the description concisely explains the PR.
• I have linked an issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation accordingly.

⌛ Dependencies

[codecov-commenter]

Codecov Report

Base: 88.59% // Head: 88.58% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (82dc8d6) compared to base (fbb4127).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #35063      +/-   ##
===========================================
- Coverage    88.59%   88.58%   -0.01%     
===========================================
  Files         2140     2140              
  Lines       396961   396961              
===========================================
- Hits        351677   351653      -24     
- Misses       45284    45308      +24     

Impacted Files	Coverage Δ
src/sage/knots/knotinfo.py	83.30% <ø> (ø)
src/sage/interfaces/qsieve.py	71.30% <0.00%> (-2.61%)	⬇️
...e/combinat/cluster_algebra_quiver/mutation_type.py	51.78% <0.00%> (-1.19%)	⬇️
src/sage/schemes/elliptic_curves/hom_velusqrt.py	94.09% <0.00%> (-0.79%)	⬇️
src/sage/sets/integer_range.py	91.41% <0.00%> (-0.51%)	⬇️
src/sage/rings/polynomial/ore_polynomial_ring.py	89.40% <0.00%> (-0.43%)	⬇️
src/sage/combinat/constellation.py	91.18% <0.00%> (-0.41%)	⬇️
src/sage/modular/arithgroup/arithgroup_perm.py	92.57% <0.00%> (-0.38%)	⬇️
src/sage/modular/overconvergent/hecke_series.py	98.76% <0.00%> (-0.31%)	⬇️
src/sage/graphs/graph_plot.py	84.33% <0.00%> (-0.29%)	⬇️
... and 14 more

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[github-actions]

Documentation preview for this PR is ready! 🎉
Built with commit: 82dc8d6

[mkoeppe]

LGTM!

[soehms]

LGTM!

Thanks!