add description to outage_durations

Author: adfarth

src/core/electric_utility.jl

@@ -13,7 +13,7 @@
     # Multiple Outage Modeling Inputs (Outage Modeling Option 2): minimax the expected outage cost,
     # with max taken over outage start time, expectation taken over outage duration
     outage_start_time_steps::Array{Int,1}=Int[],  # we minimize the maximum outage cost over outage start times
-    outage_durations::Array{Int,1}=Int[],  # one-to-one with outage_probabilities, outage_durations can be a random variable
+    outage_durations::Array{Int,1}=Int[],  # One-to-one with outage_probabilities. Outage_durations can be a random variable, and should be in timesteps aligning with time_steps_per_hour (e.g., duration of 4 equates to 1 hour if time_steps_per_hour is 4)
     outage_probabilities::Array{R,1} where R<:Real = [1.0],
     
     ### Cambium Emissions and Clean Energy Inputs ###