shift beta phase dates to start next week

Author: zkamvar

_config.yml

@@ -15,9 +15,9 @@ title: "R for Social Scientists"
 # Life cycle stage of the lesson
 # possible values: "pre-alpha", "alpha", "beta", "stable"
 life_cycle: "transition-step-1"
-transition_date_prebeta: '2022-10-24'
-transition_date_beta: '2022-11-21'
-transition_date_prerelease: '2023-01-30'
+transition_date_prebeta: '2022-10-31'
+transition_date_beta: '2022-11-28'
+transition_date_prerelease: '2023-02-06'
 
 
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