chore: Further Renovate tweaks

Author: alessfg

.github/renovate.json

@@ -30,6 +30,10 @@
       {
         "matchPackageNames": ["docker/**"],
         "groupName": "Docker Actions"
+      },
+      {
+        "enabled": false,
+        "matchUpdateTypes": ["digest"]
       }
     ]
   },
@@ -39,6 +43,10 @@
       {
         "matchPackageNames": ["*"],
         "groupName": "Python dependencies"
+      },
+      {
+        "matchPackageNames": ["ansible-core"],
+        "separateMinorPatch": true
       }
     ]
   }