ci: add Renovate comment to salt-minion

* note that each major version release series is updated separately
  and new major versions will need to be added to the sls file manually

.github/renovate.json5

@@ -38,6 +38,12 @@
       "matchPackageNames": ["python/cpython"],
       "separateMinorPatch": true,
     },
+    {
+      // Salt major version releases must be added manually to the sls file
+      "matchDepPrefixes": ["salt-"],
+      "matchUpdateTypes": ["major"],
+      "enabled": false,
+    },
     {
       "matchFileNames": ["**/*.sls"],
       "commitMessageAction": "add",

salt-minion.sls

@@ -12,9 +12,14 @@
 
 # Starting in Version 3006 salt standardized builds across all OSes on the
 # Relative Environment for Python project (relenv). The url changed as a result
+# Use Renovate to apply automatic version updates. Due to the way Renovate works
+# each major version must be updated separately (otherwise all versions would be
+# updated to the latest version). New major versions e.g. 3008.0 must be added manually.
 {%- load_yaml as versions_relenv %}
+# renovate: datasource=github-tags depName=salt-3007.x packageName=saltstack/salt
 - 3007.1
 - 3007.0
+# renovate: datasource=github-tags depName=salt-3006.x packageName=saltstack/salt
 - 3006.8
 - 3006.7
 - 3006.6