Dont change old security advisory

wiki/src/security/Upgrade_Tor.mdwn

@@ -24,7 +24,7 @@ To upgrade Tor, start a *Root Terminal* from the
 *Applications* → *Accessories* menu, and type the following command in
 there:
 
-	apt update && apt install tor && service tor start
+	apt-get update && apt-get install tor && service tor start
 
 ... then type *Enter*, and wait until the upgrade is completed, which
 may take a few minutes. At this time, the Vidalia icon on the top