Fix typo in bert name.

docs/performance.md

@@ -7,7 +7,7 @@ for more.
 
 |Treebank                 |Model name          |UPOS |XPOS  |UFeats|AllTags|Lemmas|UAS  |LAS  |CLAS |MLAS |BLEX |Language model |LICENSE                                                                                 |
 |-------------------------|--------------------|-----|------|------|-------|------|-----|-----|-----|-----|-----|---------------|----------------------------------------------------------------------------------------|
-|UD_English-EWT           |[english-bert-base](http://mozart.ipipan.waw.pl/~mklimaszewski/models/english-bert-base.tar.gz)    |96.53|96.41 |97.34 |95.04  |97.72 |92.17|89.75|87.25|82.14|84.65|bert-case-cased|https://github.com/UniversalDependencies/UD_English-EWT/blob/r2.7/LICENSE.txt           |
+|UD_English-EWT           |[english-bert-base](http://mozart.ipipan.waw.pl/~mklimaszewski/models/english-bert-base.tar.gz)    |96.53|96.41 |97.34 |95.04  |97.72 |92.17|89.75|87.25|82.14|84.65|bert-base-cased|https://github.com/UniversalDependencies/UD_English-EWT/blob/r2.7/LICENSE.txt           |
 |UD_Polish_PDB            |[polish-herbert-base](http://mozart.ipipan.waw.pl/~mklimaszewski/models/polish-herbert-base.tar.gz)  |98.93|96.42 |96.79 |95.73  |98.08 |95.53|93.81|92.30|87.44|89.86|herbert-base   |https://github.com/UniversalDependencies/UD_Polish-PDB/blob/r2.7/LICENSE.txt            |
 |UD_Polish_PDB            |[polish-herbert-large](http://mozart.ipipan.waw.pl/~mklimaszewski/models/polish-herbert-large.tar.gz)|99.04|96.65 |96.97 |95.95  |98.13 |95.48|93.84|92.31|87.84|90.04|herbert-large  |https://github.com/UniversalDependencies/UD_Polish-PDB/blob/r2.7/LICENSE.txt            |
 |UD_Afrikaans-AfriBooms   |[afrikaans-ud27](http://mozart.ipipan.waw.pl/~mklimaszewski/models/afrikaans-ud27.tar.gz)      |97.13|91.79 |96.54 |91.32  |96.78 |87.43|84.30|78.08|72.56|74.06|fastText       |https://github.com/UniversalDependencies/UD_Afrikaans-AfriBooms/blob/r2.7/LICENSE.txt   |