Add missing subgroups

Bio_Industries_2/data-updates.lua

@@ -458,6 +458,7 @@ if not data.raw.fluid["nitrogen"] then
             flow_color = { r = 0.0, g = 0.0, b = 1.0 },
             pressure_to_speed_ratio = 0.4,
             flow_to_energy_ratio = 0.59,
+            subgroup = "fluid",
             order = "a[fluid]-b[nitrogen]"
         },
     })
@@ -485,6 +486,7 @@ if not data.raw.fluid["nitrogen"] then
                 flow_color = { r = 0.5, g = 1.0, b = 1.0 },
                 pressure_to_speed_ratio = 0.4,
                 flow_to_energy_ratio = 0.59,
+                subgroup = "fluid",
                 order = "a[fluid]-b[liquid-air]"
             },
         })

Bio_Industries_2/prototypes/Bio_Farm/liquids.lua

@@ -22,6 +22,7 @@ data:extend({
     flow_color = {r = 0.1, g = 1.0, b = 0.0},
     pressure_to_speed_ratio = 0.4,
     flow_to_energy_ratio = 0.59,
+    subgroup = "bio-bio-fuel-fluid",
     order = "a[fluid]-b[biomass]"
   },
 })