chore: rename proposal to use PR number 115

Author: k-wall

…posals/000-rendered-install-manifests.md …posals/115-rendered-install-manifests.mdproposals/000-rendered-install-manifests.md renamed to proposals/115-rendered-install-manifests.md proposals/000-rendered-install-manifests.md renamed to proposals/115-rendered-install-manifests.md

@@ -7,7 +7,7 @@ To submit this proposal:
 5. Push changes
 -->
 
-# XXX - Rendered Install Manifests for GitOps Deployments
+# 115 - Rendered Install Manifests for GitOps Deployments
 
 Publish fully-rendered Kubernetes installation manifests as GitHub release assets to enable GitOps workflows and direct installation without downloading archives.