Revert "Update thinc from 9.1.0 to 9.1.1"

This reverts commit e44328c.

This is the only package in this round that depends on numpy v2,
so defer it to next week.

requirements-test-libraries.txt

@@ -107,7 +107,7 @@ spacy==3.7.6
 srsly==2.4.8
 swagger-spec-validator==3.0.4
 tableauhyperapi==0.0.20027
-thinc==9.1.1; python_version >= '3.9'
+thinc==9.1.0; python_version >= '3.9'
 timezonefinder==6.5.2; python_version > '3.8'
 trame==3.6.5
 trame-client==3.2.5