Update renovate/dependabot to rebase on develop branch by default

.github/dependabot.yml

@@ -6,6 +6,7 @@
 version: 2
 updates:
   - package-ecosystem: "github-actions"
+    target-branch: "develop"
     directory: "/" # Location of package manifests
     schedule:
       interval: "weekly"

renovate.json

@@ -1,9 +1,9 @@
 {
-  "baseBranches": ["master"],
+  "baseBranches": ["develop"],
   "rebaseWhen": "conflicted",
   "labels": ["Dependencies"],
   "extends": [
-    ["config:best-practices"],
+    "config:best-practices",
     "github>mihonapp/mihon//.github/renovate.json5"
   ],
   "includeForks": true