chore: Do not spellcheck the gitignore file

Author: deadlydog

.cspell.json

@@ -12,7 +12,8 @@
 		"**/build-and-test-powershell-module.yml",
 		"**/build-test-and-deploy-powershell-module.yml",
 		"**/bin/**", // Ignore C# build output files.
-		"**/obj/**" // Ignore C# build output files.
+		"**/obj/**", // Ignore C# build output files.
+		".gitignore"
 	],
 	"words": [
 		"behaviour",