Merge pull request RasaHQ#5590 from RasaHQ/dependabot/pip/pygments-2.6.1

Bump pygments from 2.2.0 to 2.6.1

Author: wochinge

poetry.lock

@@ -149,7 +149,7 @@ semantic_version = "^2.8.4"
 sphinx = "==3.0.0"
 sphinx-autobuild = "==0.7.1"
 sphinxcontrib-programoutput = "==0.11"
-pygments = "==2.2.0"
+pygments = "^2.6.1"
 sphinxcontrib-httpdomain = "==1.6.1"
 sphinxcontrib-websupport = "==1.1.0"
 sphinxcontrib-trio = "==1.0.2"