chore(sbpp_main): bump plugin version for security fix (#1398)

Author: Rushaway

game/addons/sourcemod/scripting/include/sourcebanspp.inc

@@ -31,7 +31,7 @@
 
 #define SB_VERSION_MAJOR "1"
 #define SB_VERSION_MINOR "8"
-#define SB_VERSION_PATCH "5"
+#define SB_VERSION_PATCH "6"
 
 #define SB_VERSION   SB_VERSION_MAJOR..."."...SB_VERSION_MINOR..."."...SB_VERSION_PATCH