Fix the base productivity on Composter from Composter TURD path 2.

changelog.txt

@@ -4,6 +4,7 @@ Date: ?
   Changes:
     - Composter TURD path 2 no longer generates methanol. Now it instead generates coalbed gas. Resolves https://github.com/pyanodon/pybugreports/issues/757
     - Greatly increased the science pack requirement for the wood processing unit turd from 500 -> 7000. Resolves https://github.com/pyanodon/pybugreports/issues/758
+    - Fix the base productivity on Composter from Composter TURD path 2.
     - All caravans can use all caravan outpost types
 ---------------------------------------------------------------------------------------------------
 Version: 3.0.31

prototypes/upgrades/compost.lua

@@ -12,7 +12,7 @@ if data and not yafc_turd_integration then
         end
         entity.localised_name = {"entity-name." .. name}
         entity.placeable_by = {item = name, count = 1}
-        effect_receiver = {
+        entity.effect_receiver = {
             base_effect = {
                 productivity = i * 0.05
             }