Upgrade Watcher: Fix notification channel for crashes (#2320)

* Fix notification channel for crashes

* Adding CHANGELOG fragment

changelog/fragments/1677255543-upgrade-watcher-fix-log.yaml

@@ -0,0 +1,32 @@
+# Kind can be one of:
+# - breaking-change: a change to previously-documented behavior
+# - deprecation: functionality that is being removed in a later release
+# - bug-fix: fixes a problem in a previous version
+# - enhancement: extends functionality but does not break or fix existing behavior
+# - feature: new functionality
+# - known-issue: problems that we are aware of in a given version
+# - security: impacts on the security of a product or a user’s deployment.
+# - upgrade: important information for someone upgrading from a prior version
+# - other: does not fit into any of the other categories
+kind: bug-fix
+
+# Change summary; a 80ish characters long description of the change.
+summary: Fixes the log message being emitted by the Upgrade Watcher when a crash is detected by it.
+
+# Long description; in case the summary is not enough to describe the change
+# this field accommodate a description without length limits.
+# NOTE: This field will be rendered only for breaking-change and known-issue kinds at the moment.
+#description:
+
+# Affected component; a word indicating the component this changeset affects.
+component: agent
+
+# PR URL; optional; the PR number that added the changeset.
+# If not present is automatically filled by the tooling finding the PR where this changelog fragment has been added.
+# NOTE: the tooling supports backports, so it's able to fill the original PR number instead of the backport PR number.
+# Please provide it if you are adding a fragment for a different PR.
+pr: https://github.com/elastic/elastic-agent/pull/2320
+
+# Issue URL; optional; the GitHub issue related to this changeset (either closes or is part of).
+# If not present is automatically filled by the tooling with the issue linked to the PR number.
+#issue: https://github.com/owner/repo/1234

internal/pkg/agent/cmd/watch.go

@@ -139,7 +139,7 @@ func watch(ctx context.Context, tilGrace time.Duration, log *logger.Logger) erro
 		return err
 	}
 
-	crashChecker, err := upgrade.NewCrashChecker(ctx, errChan, log)
+	crashChecker, err := upgrade.NewCrashChecker(ctx, crashChan, log)
 	if err != nil {
 		return err
 	}