chore: Further Renovate tweaks

Author: alessfg

.github/renovate.json

@@ -30,16 +30,17 @@
       {
         "matchPackageNames": ["docker/**"],
         "groupName": "Docker Actions"
+      },
+      {
+        "enabled": false,
+        "matchUpdateTypes": ["digest"]
       }
     ]
   },
   "pip_requirements": {
     "fileMatch": ["(^|/)[\\w-]*requirements([_.]\\w+)?\\.(txt|pip)$"],
     "packageRules": [
-      {
-        "matchPackageNames": ["*"],
-        "groupName": "Python dependencies"
-      }
+
     ]
   }
 }