Fix release builds (#1317)

In order to preserve the folder hierarchy in our uploaded artifact,
we need to insert a wildcard in the root path.

Also, fix fan-in of tasks that lead to the publish test result task.

.github/PklProject

@@ -2,7 +2,7 @@ amends "pkl:Project"
 
 dependencies {
   ["pkl.impl.ghactions"] {
-    uri = "package://pkg.pkl-lang.org/pkl-project-commons/pkl.impl.ghactions@0.6.1"
+    uri = "package://pkg.pkl-lang.org/pkl-project-commons/pkl.impl.ghactions@0.7.1"
   }
   ["gha"] {
     uri = "package://pkg.pkl-lang.org/github.com/stefma/pkl-gha/com.github.action@0.0.6"