Bug 25013: Fix capitalization: Edit Items on batch item edit

Fixes a tiny string issue: Edit Items --> Edit items

To test:
- Go to tools / batch item edit
- Enter a barcode
- Check the heading above the edit item form
- Apply patch
- Verify the heading is now properly capitalized

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Signed-off-by: Joy Nelson <joy@bywatersolutions.com>
(cherry picked from commit b3ecfd686d)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>

koha-tmpl/intranet-tmpl/prog/en/modules/tools/batchMod-edit.tt

@@ -240,7 +240,7 @@ $(document).ready(function(){
 
 [% UNLESS (too_many_items_process) %]
 <div id="cataloguing_additem_newitem">
-        <h2>Edit Items</h2>
+        <h2>Edit items</h2>
         <div class="hint">Checking the box right next to the subfield label will disable the entry and delete the subfield on all selected items. Leave fields blank to make no change.</div>
   <fieldset class="rows">
   <ol>