141115: Align viewport meta with the canonical width=device-width, initial-scale=1 pattern

The previous value `width=device-width,minimum-scale=1` worked correctly with
the project's responsive CSS, but diverged from the documented best-practice
shipped by Bootstrap 5 starters and the Angular CLI default. `initial-scale=1`
guarantees the page renders at 100% on first paint across mobile browsers and
embedded WebViews; dropping `minimum-scale=1` removes the unneeded
pinch-zoom-out restriction.

Author: bram-atmire

src/index.html

@@ -5,7 +5,7 @@
   <meta charset="UTF-8">
   <base href="/">
   <title>DSpace</title>
-  <meta name="viewport" content="width=device-width,minimum-scale=1">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta http-equiv="cache-control" content="no-store">
 </head>