Merge branch 'renovate/configure' into 'master'

Configure Renovate

See merge request !25

renovate.json

+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["local>funkwhale/ci//renovate"],
+  "prConcurrentLimit": 1,
+  "rangeStrategy": "pin"
+}
+