Minor fix in documentation

Author: jbo-ads

mapcache.xml.sample

@@ -1050,7 +1050,7 @@
 
    <!--
         Parameters for fine tuning connection_pool component, used for
-        connections to SQLite caches
+        connections to caches
         - max_connections: maximum number of open connections at the same time
           (default: 1024)
         - time_to_live_us: maximum amount of time in microseconds an unused