chore(config): migrate renovate config (#25) [skip ci]

Co-authored-by: unill-renovate[bot] <192801153+unill-renovate[bot]@users.noreply.github.com>
Co-authored-by: Pierre Cavin <me@sherlox.io>

Author: unill-renovate[bot]

.github/renovate.json5

@@ -1,12 +1,19 @@
 {
-  $schema: "https://docs.renovatebot.com/renovate-schema.json",
-  extends: ["github>unill-io/.github//renovate/elixir/elixir-lib"],
+  $schema: 'https://docs.renovatebot.com/renovate-schema.json',
+  extends: [
+    'github>unill-io/.github//renovate/elixir/elixir-lib',
+  ],
   packageRules: [
     // disable Elixir and Erlang updates via asdf because we want to support older versions
     {
-      matchPackagePatterns: ["erlang", "elixir"],
-      matchManagers: ["asdf"],
+      matchManagers: [
+        'asdf',
+      ],
       enabled: false,
+      matchPackageNames: [
+        '/erlang/',
+        '/elixir/',
+      ],
     },
   ],
 }