Fix SarifMark version from 1.2.0 to 1.1.0

Corrected the SarifMark version in dotnet-tools.json to use the actual
available version 1.1.0 instead of non-existent 1.2.0. Verified with
dotnet tool restore.

Co-authored-by: Malcolmnixon <1863707+Malcolmnixon@users.noreply.github.com>

Author: Copilot

.config/dotnet-tools.json

@@ -21,7 +21,7 @@
       ]
     },
     "demaconsulting.sarifmark": {
-      "version": "1.2.0",
+      "version": "1.1.0",
       "commands": [
         "sarifmark"
       ]