CompatHelper: bump compat for NamedGraphs to 0.8, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the NamedGraphs package from 0.7.1 to 0.7.1, 0.8.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

❌ Patch coverage is 76.47059% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.34%. Comparing base (afd15c3) to head (eb72485).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/caches/abstractbeliefpropagationcache.jl	66.66%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #264      +/-   ##
==========================================
- Coverage   68.51%   68.34%   -0.18%     
==========================================
  Files          81       81              
  Lines        4005     4021      +16     
==========================================
+ Hits         2744     2748       +4     
- Misses       1261     1273      +12     

Flag	Coverage Δ
docs	0.00% <0.00%> (ø)

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[mtfishman]

Depends on ITensor/NamedGraphs.jl#113 and ITensor/DataGraphs.jl#54 for tests to pass.