fix: add missing slides + minutes tabs to session materials dialog #4274

[NGPixel]

Adds the missing Slides and Minutes tabs to the session materials dialog on the agenda-neue page.

Fixes #4274

[codecov]

Codecov Report

Merging #4275 (74286e8) into main (fe1f51a) will increase coverage by 0.00%.
The diff coverage is 89.65%.

@@           Coverage Diff           @@
##             main    #4275   +/-   ##
=======================================
  Coverage   88.40%   88.40%           
=======================================
  Files         294      294           
  Lines       39197    39205    +8     
=======================================
+ Hits        34652    34661    +9     
+ Misses       4545     4544    -1     

Impacted Files	Coverage Δ
ietf/api/urls.py	100.00% <ø> (ø)
ietf/doc/urls.py	100.00% <ø> (ø)
ietf/nomcom/forms.py	95.39% <ø> (ø)
ietf/nomcom/models.py	91.73% <ø> (ø)
ietf/utils/markdown.py	100.00% <ø> (ø)
ietf/meeting/views.py	90.78% <73.68%> (-0.04%)	⬇️
ietf/doc/views_draft.py	91.90% <94.11%> (-0.09%)	⬇️
ietf/doc/views_ballot.py	91.86% <100.00%> (+0.10%)	⬆️
ietf/doc/views_doc.py	90.53% <100.00%> (+0.04%)	⬆️
ietf/doc/views_status_change.py	93.36% <100.00%> (+0.20%)	⬆️
... and 7 more

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