chore: update demaconsulting.fileassert to 0.5.1

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 2 people

.config/dotnet-tools.json

@@ -57,7 +57,7 @@
       ]
     },
     "demaconsulting.fileassert": {
-      "version": "0.4.0",
+      "version": "0.5.1",
       "commands": [
         "fileassert"
       ]