fix(helm): Use parentesized guards for control plane tracing

Similar to #14634, This adds parenthesized guards for the control plane tracing values check

Signed-off-by: Scott Fleener <[email protected]>

Author: sfleen

charts/partials/templates/_trace.tpl

@@ -1,5 +1,5 @@
 {{ define "partials.linkerd.trace" -}}
-{{ if .Values.controller.tracing.enabled -}}
+{{ if ((.Values.controller.tracing).enabled) -}}
 {{- if empty .Values.controller.tracing.collector.endpoint }}
 {{- fail "controller.tracing.collector.endpoint must be set if control plane tracing is enabled" }}
 {{- end }}