Update PPA scripts.

scripts/release_ppa.sh

@@ -55,9 +55,9 @@ keyid=70D110489D66E2F6
 email=builds@ethereum.org
 packagename=solc
 
-static_build_distribution=disco
+static_build_distribution=focal
 
-DISTRIBUTIONS="bionic disco eoan focal"
+DISTRIBUTIONS="bionic eoan focal"
 
 if is_release
 then
@@ -85,7 +85,7 @@ else
     fi
     if [ $distribution = focal ]
     then
-        SMTDEPENDENCY="libz3-dev,
+        SMTDEPENDENCY="libz3-static-dev,
             libcvc4-dev,
             "
     elif [ $distribution = disco ]