Exclude binary fonts and test corpora from editorconfig-checker (#1309)

editorconfig-checker v3.7.0 added stricter pre-decode binary detection.
GOTHIC.TTF has an uppercase extension that bypasses the case-sensitive
default \.ttf$ exclude, and two random-text test corpora under
Analysis/Core/ contain byte sequences the new detector flags as binary.

Add both patterns to the Exclude list. The .editorconfig override for
test .txt files only unsets formatting rules and cannot silence the
encoding-detection check.

Author: paulirwin

.editorconfig-checker.json

@@ -9,7 +9,9 @@
     "\\.DotSettings$",
     "App\\.config$",
     "\\.htaccess$",
-    "packages\\.lock\\.json$"
+    "packages\\.lock\\.json$",
+    "\\.[Tt][Tt][Ff]$",
+    "src/Lucene\\.Net\\.Tests\\.Analysis\\.Common/Analysis/Core/.*\\.txt$"
   ],
   "AllowedContentTypes": [],
   "PassedFiles": [],