[ci][docs] temporarily pin Sphinx version (#3157)

StrikerRUS · web-flow · commit b3a84df5af08 · 2020-06-11T01:52:09.000+03:00
diff --git a/docs/requirements_base.txt b/docs/requirements_base.txt
@@ -1,3 +1,3 @@
-sphinx
+sphinx == 3.0.2
 sphinx_rtd_theme >= 0.3
 mock; python_version < '3'
diff --git a/docs/requirements_rtd.txt b/docs/requirements_rtd.txt
@@ -1,4 +1,4 @@
-sphinx >= 3.0.2
+sphinx == 3.0.2
 sphinx_rtd_theme >= 0.3
 mock; python_version < '3'
 breathe
