Update update script to openHAB 5.x (#1815)

Signed-off-by: openhab-bot <bot@openhab.org>

Author: openhab-bot

distributions/openhab/src/main/resources/bin/update

@@ -10,9 +10,9 @@ setup(){
     echo "Usage: ./runtime/bin/update [VersionNumber] [openHAB Dir]"
     echo ""
     echo "  e.g. ./runtime/bin/update                << Updates to the next version"
-    echo "       ./runtime/bin/update 4.0.0          << Updates to a specific version"
-    echo "       ./update 4.0.0 /opt/openHAB         << Updates a specific root folder"
-    echo "       ./runtime/bin/update 4.0.0-SNAPSHOT << Updates to latest SNAPSHOT"
+    echo "       ./runtime/bin/update 5.0.0          << Updates to a specific version"
+    echo "       ./update 5.0.0 /opt/openHAB         << Updates a specific root folder"
+    echo "       ./runtime/bin/update 5.1.0-SNAPSHOT << Updates to latest SNAPSHOT"
     echo ""
     echo "Use this script to change openHAB to another version. Specifying the version allows"
     echo "you to upgrade or downgrade to that version, or to the latest snapshot. Not specifying"
@@ -243,7 +243,7 @@ scanVersioningList() {
 
 echo "                                         "
 echo "#########################################"
-echo "        openHAB 4.x update script        "
+echo "        openHAB 5.x update script        "
 echo "#########################################"
 echo "                                         "