Update link to Helm proposal to be part of CNCF

Signed-off-by: Baiju Muthukadan <[email protected]>

Author: baijum

sig-apps/README.md

@@ -110,7 +110,7 @@ The core workloads API, which is composed of the CronJob, DaemonSet, Deployment,
 
 ## [Helm](https://helm.sh) and [Charts](https://github.com/kubernetes/charts)
 
-Helm, Charts and its other subprojects have [moved to the CNCF](https://github.com/cncf/toc/blob/master/proposals/helm.adoc).
+Helm, Charts and its other subprojects have [moved to the CNCF](https://github.com/cncf/toc/blob/main/proposals/incubation/helm.adoc).
 See Helm's [community repository](https://github.com/kubernetes-helm/community) for information about the Helm project.
 
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