test: update search in test to match template changes

[jennifer-richards]

Fixes test failure caused by ietf-tools#3803.

[codecov]

Codecov Report

Merging #3814 (799214a) into feat/bs5 (8bd4851) will increase coverage by 0.00%.
The diff coverage is 96.42%.

@@            Coverage Diff            @@
##           feat/bs5    #3814   +/-   ##
=========================================
  Coverage     87.97%   87.98%           
=========================================
  Files           296      297    +1     
  Lines         38795    38804    +9     
=========================================
+ Hits          34130    34140   +10     
+ Misses         4665     4664    -1     

Impacted Files	Coverage Δ
ietf/meeting/models.py	86.08% <ø> (ø)
ietf/meeting/utils.py	90.27% <ø> (-0.29%)	⬇️
ietf/doc/templatetags/ietf_filters.py	80.96% <50.00%> (-0.29%)	⬇️
ietf/meeting/views.py	90.73% <95.00%> (+0.02%)	⬆️
ietf/doc/templatetags/ballot_icon.py	84.89% <100.00%> (ø)
ietf/doc/views_ballot.py	91.60% <100.00%> (ø)
ietf/doc/views_charter.py	88.72% <100.00%> (ø)
ietf/doc/views_status_change.py	93.04% <100.00%> (ø)
ietf/ietfauth/views.py	90.57% <100.00%> (ø)
ietf/liaisons/widgets.py	86.11% <100.00%> (ø)
... and 6 more

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