ci: fix renovate.json

Author: kdkasad

renovate.json

@@ -2,22 +2,14 @@
     "$schema": "https://docs.renovatebot.com/renovate-schema.json",
     "extends": ["config:recommended"],
     "enabledManagers": ["github-actions", "custom.jsonata"],
-    "customDatasources": {
-        "rust-releases": {
-            "defaultRegistryUrlTemplate": "https://api.github.com/repos/rust-lang/rust/releases",
-            "format": "json",
-            "transformTemplates": [
-                "{ \"releases\": $$[draft=false].{ \"version\": tag_name, \"isStable\": $not(prerelease) } }"
-            ]
-        }
-    },
     "customManagers": [
         {
             "customType": "jsonata",
             "managerFilePatterns": ["rust-toolchain.toml"],
             "fileFormat": "toml",
-            "datasourceTemplate": "rust-releases",
-            "depNameTemplate": "rust",
+            "datasourceTemplate": "github-releases",
+            "depNameTemplate": "rust-lang/rust",
+            "versioningTemplate": "semver-coerced",
             "matchStrings": ["{\"currentValue\": $.toolchain.channel}"]
         }
     ]