Add *.{slnx,xaml} to csharpier's default includes

Support for both filetypes was added upstream in belav/csharpier#1648 and first released in csharpier 1.1.0.

Author: lafrenierejm

examples/formatter-csharpier.toml

@@ -2,5 +2,5 @@
 [formatter.csharpier]
 command = "csharpier"
 excludes = []
-includes = ["*.cs", "*.csproj"]
+includes = ["*.cs", "*.csproj" "*.slnx" "*.xaml"]
 options = ["format"]

programs/csharpier.nix

@@ -13,7 +13,8 @@
       includes = [
         "*.cs"
         "*.csproj"
-        # "*.slnx" # add this with 1.0.3 release
+        "*.slnx" # support added in 1.1.0
+        "*.xaml" # support added in 1.1.0
       ];
     })
   ];