Fix lowercase letter in WordPress.gitignore comment

corrected the lowercase letters that should have been uppercase.

WordPress.gitignore

@@ -1,4 +1,4 @@
-# Wordpress - ignore core, configuration, examples, uploads and logs.
+# WordPress - ignore core, configuration, examples, uploads and logs.
 # https://github.com/github/gitignore/blob/main/WordPress.gitignore
 
 # Core
@@ -45,4 +45,4 @@ wp-config.php
 #
 # Note: If you wish to whitelist themes,
 # uncomment the next line
-#/wp-content/themes
+#/wp-content/themes