chore(deps): update dependency pygsheets to v2.0.6

Author: renovate[bot]

build-support/requirements/requirements.txt

@@ -12,7 +12,7 @@ edx-opaque-keys==2.2.2
 google-api-python-client==1.7.11
 google-auth==1.6.3
 google-auth-oauthlib>=0.5.2
-pygsheets==2.0.2
+pygsheets==2.0.6
 html5lib>=1.1
 hubspot-api-client==6.1.0
 lxml>=4.6.1