Update partial configs to match full

Correct mismatch between partial and full example configs introduced in
GH-407.

examples/tutorials/config_sample_2pop_modifiers_part.yml

@@ -14,7 +14,7 @@ seir_modifiers:
       method: SinglePeriodModifier
       parameter: Ro
       period_start_date: 2020-05-01
-      period_end_date: 2020-07-01
+      period_end_date: 2020-08-31
       subpop: "all"
       value: 0.8
     Ro_all:
@@ -28,7 +28,7 @@ outcome_modifiers:
     # assume that due to limitations in testing, initially the case detection probability was lower
     test_limits:
       method: SinglePeriodModifier
-      parameter: incidCase
+      parameter: incidCase::probability
       subpop: "all"
       period_start_date: 2020-02-01
       period_end_date: 2020-06-01