Add vendored detection test for XVBA path

Author: DecimalTurn

lib/linguist/vendor.yml

@@ -392,5 +392,5 @@
 # teamcity CI configuration
 - (^|/)\.teamcity/
 
-# VBAX dependencies
+# XVBA dependencies
 - (^|/)xvba_modules/

test/test_file_blob.rb

@@ -594,6 +594,9 @@ def test_vendored
     assert sample_blob(".teamcity/Project_Name_CI/Project.kt").vendored?
     assert sample_blob(".teamcity/Project_Name_CI/settings.kts").vendored?
     assert sample_blob(".teamcity/Project_Name_CI/patches/projects/3b71d400-c5d6-4628-8164-c50b1254cf1d.kts").vendored?
+
+    # XVBA dependencies
+    assert sample_blob("xvba_modules/excel-types/err.d.vb").vendored?
   end
 
   def test_documentation