Merge branch '1073-limit-number-of-concurrent-renovatebot-mrs' into 'main'

Resolve "Limit number of concurrent renovatebot MRs"

Closes #1073

See merge request !282

renovate.json

@@ -3,6 +3,7 @@
     "extends": [
         "local>stackspin/renovate-config"
     ],
+    "prConcurrentLimit": 2,
     "regexManagers": [
         {
             "fileMatch": [