project: ignore Renovate Alpine 3.14 updates

.github/renovate.json5

@@ -9,6 +9,7 @@
   schedule: ["before 8am on thursday"],
   branchPrefix: "renovate-",
   dependencyDashboardHeader: "View repository job log [here](https://app.renovatebot.com/dashboard#github/cmur2/dyndnsd).",
+  separateMinorPatch: true,
   commitMessagePrefix: "project: ",
   commitMessageAction: "update",
   commitMessageTopic: "{{depName}}",
@@ -19,6 +20,12 @@
       matchManagers: ["bundler"],
       enabled: false,
     },
+    // prevent minor updates to Alpine 3.14 due to https://wiki.alpinelinux.org/wiki/Release_Notes_for_Alpine_3.14.0#faccessat2
+    {
+      matchManagers: ["dockerfile"],
+      matchUpdateTypes: ["minor"],
+      enabled: false,
+    },
     // Commit message formats
     {
       matchDatasources: ["docker"],