qgis+qgis-ltr: fix top level package pname

Use pname instead of name which will result in name being automatically
set to "${pname}-${version}".

```
qgis.pname
"qgis"
```

```
qgis.name
"qgis-3.44.1"
```

pkgs/applications/gis/qgis/default.nix

@@ -19,10 +19,10 @@ let
     withWebKit = withWebKit;
   };
 in
-symlinkJoin rec {
 
+symlinkJoin {
   inherit (qgis-unwrapped) version src;
-  name = "qgis-${version}";
+  pname = "qgis";
 
   paths = [ qgis-unwrapped ];
 

pkgs/applications/gis/qgis/ltr.nix

@@ -19,10 +19,10 @@ let
     withWebKit = withWebKit;
   };
 in
-symlinkJoin rec {
 
+symlinkJoin {
   inherit (qgis-ltr-unwrapped) version src;
-  name = "qgis-${version}";
+  pname = "qgis";
 
   paths = [ qgis-ltr-unwrapped ];