tdf#158237 connectivity: use c++20 contains() instead of find() and end()

Change-Id: I2e047407e771b75323898ecf096721b8f3600ead
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/176799
Tested-by: Jenkins
Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>

connectivity/source/sdbcx/VCollection.cxx

@@ -66,7 +66,7 @@ namespace
 
         virtual bool exists(const OUString& _sName ) override
         {
-            return m_aNameMap.find(_sName) != m_aNameMap.end();
+            return m_aNameMap.contains(_sName);
         }
 
         virtual bool empty() override