Fix time format in headers.

The hour should be in 2 digit format while "G" doesn't add leading zero in case of single digit.

Author: ADmad

src/Middleware/GlideMiddleware.php

@@ -315,9 +315,9 @@ protected function _withCacheHeaders($response, $cacheTime, $modifiedTime)
 
         return $response
             ->withHeader('Cache-Control', 'public,max-age=' . $maxAge)
-            ->withHeader('Date', gmdate('D, j M Y G:i:s \G\M\T', time()))
-            ->withHeader('Last-Modified', gmdate('D, j M Y G:i:s \G\M\T', (int)$modifiedTime))
-            ->withHeader('Expires', gmdate('D, j M Y G:i:s \G\M\T', $expire));
+            ->withHeader('Date', gmdate('D, j M Y H:i:s \G\M\T', time()))
+            ->withHeader('Last-Modified', gmdate('D, j M Y H:i:s \G\M\T', (int)$modifiedTime))
+            ->withHeader('Expires', gmdate('D, j M Y H:i:s \G\M\T', $expire));
     }
 
     /**