Update build environment to bionic

TheAssassin · TheAssassin · commit e561a5e20d33 · 2022-07-25T01:22:01.000+02:00
xenial has been EOL for a year already.
diff --git a/ci/build.sh b/ci/build.sh
@@ -22,7 +22,7 @@ case "$ARCH" in
         docker_dist=centos7
         ;;
     armhf|aarch64)
-        docker_dist=xenial
+        docker_dist=bionic
         ;;
     *)
         echo "Unknown architecture: $ARCH"
