Promote debug output of ignored easyconfig to warning

Checking the regular log there is no indication when an easyconfig was
skipped and hence wasn't found for the patch and using `--debug` just
for that produces so much output that it is very hard to find this
single entry.

Author: Flamefire

easybuild/tools/github.py

@@ -1396,7 +1396,7 @@ def ec_key(path):
                     soft_name = ec['ec']['name']
                     break
         except EasyBuildError as err:
-            _log.debug("Ignoring easyconfig %s that fails to parse: %s", path, err)
+            _log.warning("Ignoring easyconfig %s that fails to parse: %s", path, err)
         sys.stdout.write('\r%s of %s easyconfigs checked' % (idx + 1, nr_of_ecs))
         sys.stdout.flush()