mk/*pl: Remove type="text/javascript" as it is unnecessary

* mk/mansplit.pl: Remove type="text/javascript" as it is
unnecessary.

* mk/guidesplit.pl: Ditto.

Reported-by: TEC <tecosaur@gmail.com>
Link: https://orgmode.org/list/874kkkxqma.fsf@gmail.com/

mk/guidesplit.pl

@@ -37,8 +37,8 @@ EOF
 
 $script = <<'EOF';
 </style><link rel="stylesheet" href="https://orgmode.org/org.css" type="text/css" />
-<script type="text/javascript" src="https://orgmode.org/org-keys.js"></script>
-<script type="text/javascript">
+<script src="https://orgmode.org/org-keys.js"></script>
+<script>
   <!--/*--><![CDATA[/*><!--*/
    OrgKeyReader.registerHref('h', 'index.html');
    OrgKeyReader.registerHref('t', 'index.html');

mk/mansplit.pl

@@ -45,8 +45,8 @@ EOF
 
 $script = <<'EOF';
 <link rel="stylesheet" href="https://orgmode.org/org-manual.css" type="text/css" />
-<script type="text/javascript" src="https://orgmode.org/org-keys.js"></script>
-<script type="text/javascript">
+<script src="https://orgmode.org/org-keys.js"></script>
+<script>
   <!--/*--><![CDATA[/*><!--*/
    OrgKeyReader.registerHref('h', 'index.html');
    OrgKeyReader.registerHref('t', 'index.html');