Fix broken conditional check while walking global power connected items

Per the if statement and logic, we want to walk into looking up connections if we are a pin on a chip.
IsGlobalPower is a test for it's in a power symbol, so we want it false not true.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/16699

eeschema/connection_graph.cpp

@@ -3432,7 +3432,7 @@ bool CONNECTION_GRAPH::ercCheckNoConnects( const CONNECTION_SUBGRAPH* aSubgraph
         // We want to throw unconnected errors for power symbols even if they are connected to other
         // net items by name, because usually failing to connect them graphically is a mistake
         if( pin && !has_other_connections
-                && pin->IsGlobalPower()
+                && !pin->IsGlobalPower()
                 && !pin->GetLibPin()->GetParent()->IsPower() )
         {
             wxString name = pin->Connection( &sheet )->Name();