Update image element CSS

Author: PTKay

wiki/theme/hedgedocs-custom.less

@@ -145,8 +145,8 @@
     display: block;
     cursor: default !important;
     object-fit: contain;
-    max-width: 20vw;
-    max-height: 15vw;
+    max-width: 50vw;
+    max-height: 40vh;
 }
 
 @media screen and (max-width: 76.25em) {
@@ -354,3 +354,4 @@
     padding: 0;
     margin: 0 !important;
 }
+