chore(ci): Trigger build when main is updated (#2768)

* add trigger when commits are pushed to main

* rename to pull-requests.json (this is the default name)

Author: delanni

.buildkite/pull_requests.json .buildkite/pull-requests.json.buildkite/pull_requests.json renamed to .buildkite/pull-requests.json

@@ -9,7 +9,7 @@
       "allow_org_users": true,
       "allowed_repo_permissions": ["admin", "write"],
       "allowed_list": ["elastic-vault-github-plugin-prod[bot]"],
-      "set_commit_status": false,
+      "set_commit_status": true,
       "build_on_commit": true,
       "build_on_comment": true,
       "build_drafts": true,
@@ -26,6 +26,26 @@
       "kibana_build_reuse": false,
       "kibana_build_reuse_pipeline_slugs": [],
       "kibana_build_reuse_regexes": []
+    },
+    {
+      "repoOwner": "elastic",
+      "repoName": "elastic-charts",
+      "pipelineSlug": "kibana-elastic-charts-build",
+
+      "enabled": true,
+      "allow_org_users": true,
+      "allowed_repo_permissions": ["admin", "write"],
+      "allowed_list": ["elastic-vault-github-plugin-prod[bot]"],
+      "set_commit_status": true,
+      "build_on_commit": true,
+      "build_on_comment": false,
+      "build_drafts": false,
+      "build_on_ready": false,
+      "enable_skippable_commits": false,
+      "skip_ci_on_only_changed": [],
+      "always_require_ci_on_changed": [],
+      "enable_trigger_checkbox": false,
+      "target_branch": "main"
     }
   ]
 }