Merge pull request pi-hole#2897 from pi-hole/fix/readOnlyBin

Remove readonly attribute of the PI_HOLE_BIN_DIR declaration in pihole

Author: AzureMarker

pihole

@@ -10,14 +10,14 @@
 # Please see LICENSE file for your rights under this license.
 
 readonly PI_HOLE_SCRIPT_DIR="/opt/pihole"
-readonly PI_HOLE_BIN_DIR="/usr/local/bin"
 readonly gravitylist="/etc/pihole/gravity.list"
 readonly blacklist="/etc/pihole/black.list"
 
-# setupVars is not readonly here because in some funcitons (checkout),
+# setupVars and PI_HOLE_BIN_DIR are not readonly here because in some funcitons (checkout),
 # it might get set again when the installer is sourced. This causes an
 # error due to modifying a readonly variable.
 setupVars="/etc/pihole/setupVars.conf"
+PI_HOLE_BIN_DIR="/usr/local/bin"
 
 readonly colfile="${PI_HOLE_SCRIPT_DIR}/COL_TABLE"
 source "${colfile}"