feat: Added Czech to the set of vocabularies in datasets/vocabs.py

Author: Xargonus

doctr/datasets/vocabs.py

@@ -31,3 +31,4 @@
 VOCABS['german'] = VOCABS['english'] + 'äöüßÄÖÜẞ'
 VOCABS['arabic'] = (VOCABS['digits'] + VOCABS['hindi_digits'] + VOCABS['arabic_letters'] + VOCABS['persian_letters'] +
                     VOCABS['arabic_diacritics'] + VOCABS['arabic_punctuation'] + VOCABS['punctuation'])
+VOCABS['czech'] = VOCABS['english'] + 'áčďéěíňóřšťúůýžÁČĎÉĚÍŇÓŘŠŤÚŮÝŽ'