From 8f61064326505413f8aa62834e7e5f00430cb33b Mon Sep 17 00:00:00 2001
From: Thomas Landauer <thomas@landauer.at>
Date: Thu, 6 Feb 2025 15:51:51 +0100
Subject: [PATCH] Update README.md: Minor: Adding const

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index fa49967c..1298025f 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ echo $message->getHeader('X-Foo');                     // for custom or undocume
 $att = $message->getAttachmentPart(0);                 // first attachment
 echo $att->getHeaderValue(HeaderConsts::CONTENT_TYPE); // e.g. "text/plain"
 echo $att->getHeaderParameter(                         // value of "charset" part
-    'content-type',
+    HeaderConsts::CONTENT_TYPE,
     'charset'
 );
 echo $att->getContent();                               // get the attached file's contents