install pip before calling it during run-tests

Author: briangow

.github/workflows/run-tests.yml

@@ -44,6 +44,7 @@ jobs:
                   python3-matplotlib \
                   python3-numpy \
                   python3-pandas \
+                  python3-pip \
                   python3-requests \
                   python3-scipy \
                   python3-soundfile \