CompatHelper: bump compat for "Documenter" to "0.27" (#198)

Author: github-actions[bot]

Project.toml

@@ -42,7 +42,7 @@ Colors = "0"
 CoordinateTransformations = "0"
 DemoCards = "0.4"
 Distances = "0"
-Documenter = "0.26"
+Documenter = "0.27"
 FileIO = "1"
 FixedPointNumbers = "0"
 ImageAxes = "0"