require specific sphinx version

jepler · jepler · commit 822f9931257c · 2021-11-03T14:21:49.000-05:00
diff --git a/docs/requirements.txt b/docs/requirements.txt
@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+sphinx>=4.0.0
