renovatebot: Raise pr limit & fix invalid value

.renovaterc.json

@@ -2,10 +2,11 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:base",
-    "docker:enableMajor"
+    "docker:enableMajor",
+    ":prHourlyLimitNone"
   ],
-  "prConcurrentLimit": 5,
-  "semanticCommits": false,
+  "prConcurrentLimit": 10,
+  "semanticCommits": "disabled",
   "commitMessagePrefix": "automation:",
   "commitMessageTopic": "{{depName}}",
   "commitMessageExtra": "to {{#if isMajor}}version {{{newMajor}}}{{else}}{{#if isSingleVersion}}version {{{toVersion}}}{{else}}{{{newValue}}}{{/if}}{{/if}}",