release: Make sure pip is installed.

- Its good that sudo is needed early in the script, so a password
  isn't needed later for install-tools.

install

@@ -4,6 +4,7 @@
 set -e
 
 
+sudo apt-get install -y python3-pip
 python3.9 -m pip install -r ./termstr/requirements.txt ./termstr \
                          -r ./fill3/requirements.txt ./fill3 \
                          ./lscolors \