Bug 22372: (QA follow-up) Change 'Available location' to 'Shelving location'

Make terminology more consistent with other places in Koha.

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>

koha-tmpl/intranet-tmpl/prog/en/includes/waiting_holds.inc

@@ -9,7 +9,7 @@
             <th>Patron</th>
             <th>Home branch</th>
             <th>Current location</th>
-            <th>Available location</th>
+            <th>Shelving location</th>
             <th>Call number</th>
             <th>Copy number</th>
             <th>Enumeration</th>