⬆️(project) activate renovate options for commit body description

In the renovate configuration, when activated, the flag
`commitBodyTable` enables to append a table with all the updates in the
commit. To fit to our previous commit description with pybot, we have
activated this flag.

renovate.json

@@ -1,5 +1,8 @@
 {
     "extends": ["github>openfun/renovate-configuration"],
+    "commitMessagePrefix": "⬆️(project)",
+    "commitMessageAction": "upgrade",
+    "commitBodyTable": true,
     "enabledManagers": ["pip_requirements"],
     "packageRules": [
         {