If we look at the population numbers for the last 24 years there's nothing particularly out of the ordinary going on [1].
Sure, the last two years could be the start of an explosive increase, but the drop in year-over-year increase as indicated by the charts from your own link suggests it's far more likely to return to the overall trend.
But of course: even if the population doubled over the next 5 years, Alberta is still the size of Texas, and has plenty of room to address those energy needs using renewables.
[1] https://www.statista.com/statistics/569880/population-estima...