ci: update renovate configuration to include package rules for security updates (#510)

Signed-off-by: André Silva <2493377+askpt@users.noreply.github.com>

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## This PR
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This pull request updates the `renovate.json` configuration to enhance
dependency management rules. The most notable change introduces a new
`packageRules` section to handle security updates differently than other
dependencies.

Dependency management improvements:

*
[`renovate.json`](diffhunk://#diff-7b5c8955fc544a11b4b74eddb4115f9cc51c9cf162dbffa60d37eeed82a55a57L7-R17):
Added a `packageRules` section to create pull requests for security
updates without requiring dashboard approval. These updates will not be
automatically merged, ensuring manual review.

Signed-off-by: André Silva <2493377+askpt@users.noreply.github.com>

Author: askpt

renovate.json

@@ -4,5 +4,15 @@
     "github>open-feature/community-tooling"
   ],
   "dependencyDashboardApproval": true,
-  "recreateWhen": "never"
-}
+  "recreateWhen": "never",
+  "packageRules": [
+    {
+      "description": "Create PRs for security updates without dashboard approval",
+      "matchCategories": [
+        "security"
+      ],
+      "dependencyDashboardApproval": false,
+      "automerge": false
+    }
+  ]
+}