Add a blank after printf to avoid 'Command not found' error

> curl -L https://install.pi-hole.net | bash /dev/stdin --i_do_not_follow_recommendations
...
/dev/stdin: Zeile 2449: printf  %b Skipping free disk space verification\n: Command not found.

Signed-off-by: Florian Freund <mail@floek.net>

automated install/basic-install.sh

@@ -2460,7 +2460,7 @@ main() {
     # Start the installer
     # Verify there is enough disk space for the install
     if [[ "${skipSpaceCheck}" == true ]]; then
-        printf"  %b Skipping free disk space verification\\n" "${INFO}"
+        printf "  %b Skipping free disk space verification\\n" "${INFO}"
     else
         verifyFreeDiskSpace
     fi