fix error message UnknownTokenizer

[PSeitz]

closes #1303

[codecov-commenter]

Codecov Report

Merging #1308 (0487017) into main (2e255c4) will increase coverage by 0.01%.
The diff coverage is 55.55%.

@@            Coverage Diff             @@
##             main    #1308      +/-   ##
==========================================
+ Coverage   94.05%   94.06%   +0.01%     
==========================================
  Files         230      230              
  Lines       39350    39344       -6     
==========================================
- Hits        37010    37009       -1     
+ Misses       2340     2335       -5     

Impacted Files	Coverage Δ
src/query/query_parser/query_parser.rs	95.35% <55.55%> (+0.35%)	⬆️
src/store/index/mod.rs	98.37% <0.00%> (+0.54%)	⬆️

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