Spray 3- to 4-quart slow cooker with cooking spray. In 12-inch nonstick skillet, melt 2 tablespoons of the butter over medium heat. Add shallots and garlic; cook 2 to 3 minutes, stirring frequently, until shallots are tender. Add rice; cook 2 to 3 minutes, stirring frequently, until edges of kernels are translucent. Stir in wine. Cook about 3 minutes longer, stirring constantly, until wine is absorbed. Pour rice mixture into slow cooker.