fix(zpool): correct documented format placeholders

Author: lildannita

src/modules/zpool/zpool.c

@@ -204,15 +204,15 @@ FFModuleBaseInfo ffZpoolModuleInfo = {
         { "Zpool name", "name" },
         { "Zpool guid", "guid" },
         { "Zpool state", "state" },
-        { "Size used", "used" },
-        { "Size allocated", "allocated" },
-        { "Size total", "total" },
+        { "Size used", "size-used" },
+        { "Size allocated", "size-allocated" },
+        { "Size total", "size-total" },
         { "Size used percentage num", "used-percentage" },
         { "Size allocated percentage num", "allocated-percentage" },
-        { "Fragmentation percentage num", "fragmentation-percentage" },
+        { "Fragmentation percentage num", "frag-percentage" },
         { "Size used percentage bar", "used-percentage-bar" },
         { "Size allocated percentage bar", "allocated-percentage-bar" },
-        { "Fragmentation percentage bar", "fragmentation-percentage-bar" },
+        { "Fragmentation percentage bar", "frag-percentage-bar" },
         { "Is read-only", "is-readonly" },
     }))
 };