python3.7 uses pip3

Author: Daltz333

frc-read-the-docs/Dockerfile

@@ -1,7 +1,7 @@
 FROM  ubuntu:18.04
 
 RUN apt-get update && apt-get install -y build-essential redis-server \
-    python3.7 python3.7-dev python3.7-pip \
+    python3.7 python3.7-dev \
     python3 python3-dev python3-pip \
     libxml2-dev libsxlt1-dev zlib1g-dev