Renamed Wordpress.gitignore to WordPress.gitignore

WordPress should *always* have a capital P!

WordPress.gitignore

+.htaccess
+wp-config.php
+wp-content/uploads/
+wp-content/blogs.dir/
+wp-content/upgrade/
+wp-content/backup-db/
+wp-content/advanced-cache.php
+wp-content/wp-cache-config.php
+sitemap.xml
+*.log
+wp-content/cache/
+wp-content/backups/
+sitemap.xml.gz
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