Renormalize line endings

We should have consistent line endings in our repository; now that we
have a .gitattributes file, update the repository contents to match
expectations.

ci/properties/dotnet-core.properties.json

@@ -1,6 +1,6 @@
-{
-    "name": ".NET Core",
-    "description": "Build and test a .NET Core or ASP.NET Core project.",
-    "iconName": "dotnetcore",
-    "categories": ["C#", "F#", "Visual Basic", "ASP", "ASP.NET", ".NET"]
-}
+{
+    "name": ".NET Core",
+    "description": "Build and test a .NET Core or ASP.NET Core project.",
+    "iconName": "dotnetcore",
+    "categories": ["C#", "F#", "Visual Basic", "ASP", "ASP.NET", ".NET"]
+}