Wind turbines generate electricity at the mouth of Spanish Fork Canyon on Sunday, Feb. 4, 2024. (Photo by Spenser Heaps for Utah News Dispatch)A petition by clean energy advocates to require PacifiCorp to accelerate renewable energy developments failed. Now, the group is trying again, attempting to push the company toward resources that it says could save Utah ratepayers about $10 billion. What changed? PacifiCorp has submitted its long-term ro…