fix: Use correct group type in session request email response

[larseggert]

Fixes #2120

[codecov]

Codecov Report

Merging #5275 (6bb82aa) into main (0ec1264) will decrease coverage by 0.01%.
The diff coverage is 93.75%.

@@            Coverage Diff             @@
##             main    #5275      +/-   ##
==========================================
- Coverage   88.58%   88.58%   -0.01%     
==========================================
  Files         295      294       -1     
  Lines       40114    40071      -43     
==========================================
- Hits        35534    35495      -39     
+ Misses       4580     4576       -4     

Impacted Files	Coverage Δ
ietf/iesg/urls.py	100.00% <ø> (ø)
ietf/meeting/models.py	86.03% <ø> (-0.05%)	⬇️
ietf/meeting/urls.py	81.25% <ø> (ø)
ietf/iesg/views.py	92.53% <85.18%> (-0.71%)	⬇️
ietf/secr/sreq/views.py	91.37% <85.71%> (+0.21%)	⬆️
ietf/doc/mails.py	96.20% <100.00%> (ø)
ietf/doc/utils_search.py	80.58% <100.00%> (ø)
ietf/group/views.py	90.95% <100.00%> (+0.09%)	⬆️
ietf/ietfauth/views.py	92.12% <100.00%> (+1.09%)	⬆️
ietf/meeting/helpers.py	89.84% <100.00%> (-0.07%)	⬇️
... and 6 more

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[rjsparks]

I updated the verbose names in production.

[rjsparks]

This has one rough edge that we won't encounter in practice. There is one group verbose name The Internet Society where inflecting a in front of will not produce a correct phrase, but so far the internet society isn't requesting sessions.