Update packcheck source

Author: adithyaov

.github/workflows/haskell.yml

@@ -28,8 +28,8 @@ jobs:
       # Location of packcheck.sh
       # ------------------------------------------------------------------------
       PACKCHECK_LOCAL_PATH: "./packcheck.sh"
-      PACKCHECK_GITHUB_URL: "https://raw.githubusercontent.com/harendra-kumar/packcheck"
-      PACKCHECK_GITHUB_COMMIT: "37bbe8a79ad5136e654e48e03ec519060a5b11e6"
+      PACKCHECK_GITHUB_URL: "https://raw.githubusercontent.com/composewell/packcheck"
+      PACKCHECK_GITHUB_COMMIT: "v0.6.0"
 
       # ------------------------------------------------------------------------
       # Build options