Properly name the jobs/artifacts

Author: tumic0

.appveyor.yml

@@ -9,8 +9,10 @@ image:
 environment:
   VCPKGDIR: C:\tools\vcpkg\installed\x64-windows-static-md-release
   matrix:
-  - QTDIR: C:\Qt\5.15\msvc2019_64
-  - QTDIR: C:\Qt\6.8\msvc2022_64
+  - job_name: Qt5
+    QTDIR: C:\Qt\5.15\msvc2019_64
+  - job_name: Qt6
+    QTDIR: C:\Qt\6.8\msvc2022_64
 
 install:
 - cmd: |-
@@ -26,6 +28,7 @@ build_script:
 
 artifacts:
 - path: release\pbf4.dll
+  name: pbf4.dll
 
 cache:
 - C:\tools\vcpkg\installed\