Apply suggestions from code review

Author: Borda

requirements/docs.txt

@@ -1,7 +1,7 @@
 sphinx >5.0, <6.0
 myst-parser >=0.18.1, <4.0.0
 nbsphinx >=0.8.5, <=0.9.7
-nbconvert <7.17  # temporary fix for https://github.com/jupyter/nbconvert/issues/2092
+nbconvert >7.14, <7.17
 pandoc >=1.0, <=2.3
 docutils >=0.16, <0.22
 sphinxcontrib-fulltoc >=1.0, <=1.2.0