Add homepage links for *new* packages in release notes

We already had the package names for updates of existing packages link
to the packages' homepage, but forgot (?) to do this for new packages.
I've also added a few missing links retroactively

CHANGES.md

@@ -331,9 +331,9 @@ affect some users directly.
 
 #### New packages redistributed with GAP
 
-- **classicpres** 1.22: Classical Group Presentations, by Alexander Hulpke, Eamonn O'Brien, Charles Leedham-Green, Madeleine Whybrow, Giovanni de Franceschi
-- **StandardFF** 0.9.4: Standard finite fields and cyclic generators, by Frank Lübeck
-- **UGALY** 4.0.3: Universal Groups Acting LocallY, by Khalil Hannouch, Stephan Tornier
+- [**classicpres**](http://www.math.colostate.edu/~hulpke/classicpres) 1.22: Classical Group Presentations, by Alexander Hulpke, Eamonn O'Brien, Charles Leedham-Green, Madeleine Whybrow, Giovanni de Franceschi
+- [**StandardFF**](https://www.math.rwth-aachen.de/~Frank.Luebeck/gap/StandardFF) 0.9.4: Standard finite fields and cyclic generators, by Frank Lübeck
+- [**UGALY**](https://gap-packages.github.io/UGALY) 4.0.3: Universal Groups Acting LocallY, by Khalil Hannouch, Stephan Tornier
 
 #### Updated packages redistributed with GAP
 

dev/releases/generate_package_release_notes.py

@@ -47,11 +47,12 @@ def main(old_json_file, new_json_file):
         for p in sorted(added):
             pkg = new_json[p]
             name = pkg["PackageName"]
+            home = new["PackageWWWHome"]
             desc = pkg["Subtitle"]
             vers = pkg["Version"]
             authors = [x["FirstNames"]+" "+x["LastName"] for x in pkg["Persons"] if x["IsAuthor"]]
             authors = ", ".join(authors)
-            print(f"- **{name}** {vers}: {desc}, by {authors}")
+            print(f"- [**{name}**]({home}) {vers}: {desc}, by {authors}")
         print()
 
     #
@@ -75,9 +76,8 @@ def main(old_json_file, new_json_file):
         print(f"""
 #### Updated packages redistributed with GAP
 
-The GAP {new_gap_version} distribution contains {len(new_json)}
-packages, of which {len(updated)} have been updated since GAP
-{old_gap_version}. The full list of updated packages is given below:
+The GAP {new_gap_version} distribution contains {len(new_json)} packages, of which {len(updated)} have been
+updated since GAP {old_gap_version}. The full list of updated packages is given below:
 """.lstrip())
         for p in sorted(updated):
             old = old_json[p]