CompatHelper: bump compat for "Colors" to "0.12"

Author: github-actions[bot]

Project.toml

@@ -21,7 +21,7 @@ UUIDs = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 Unmarshal = "cbff2730-442d-58d7-89d1-8e530c41eb02"
 
 [compat]
-Colors = "0.8, 0.9, 0.10, 0.11"
+Colors = "0.8, 0.9, 0.10, 0.11, 0.12"
 Distributions = "0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 1"
 DocStringExtensions = "0.8, 0.9, 0.10, 1"
 Graphs = "0.10.2, 0.11, 1"