chore: add Sourcegraph column to PRs

renovate.json

@@ -12,6 +12,17 @@
     "pinDigests": true,
     "semanticCommitType": "build"
   },
+  "prBodyDefinitions": {
+    "Sourcegraph": "[![code search for \"{{{depName}}}\"](https://sourcegraph.com/search/badge?q=repo:%5Egithub%5C.com/{{{repository}}}%24+case:yes+-file:package%28-lock%29%3F%5C.json+{{{depName}}}&label=matches)](https://sourcegraph.com/search?q=repo:%5Egithub%5C.com/{{{repository}}}%24+case:yes+-file:package%28-lock%29%3F%5C.json+{{{depName}}})"
+  },
+  "prBodyColumns": [
+    "Package",
+    "Update",
+    "Type",
+    "New value",
+    "References",
+    "Sourcegraph"
+  ],
   "packageRules": [
     {
       "depTypeList": ["dependencies"],