docker: user wildcard minor ppa git version to overcome updates

Fix #219

Author: cirosantilli

setup

@@ -17,7 +17,7 @@ if [ -f /.dockerenv ]; then
   apt install -y software-properties-common
   add-apt-repository -y ppa:git-core/ppa
   $sudo apt update
-  git=git=1:2.36.0-0ppa1~ubuntu20.04.1
+  git='git=1:2.36.*'
 else
   git=git
 fi