refactor: rename deployment change to simple-deployment

Rename the OpenSpec change from add-ftps-deployment to simple-deployment
to better reflect the current implementation using rsync over SSH.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

openspec/changes/simple-deployment/proposal.md

@@ -1,4 +1,4 @@
-# Change Proposal: add-ftps-deployment
+# Change Proposal: simple-deployment
 
 ## Why
 Currently there is no automated way to deploy the built Hugo site to the production server. Manual file transfers are error-prone and time-consuming. This change adds a deployment script to automate uploads via rsync over SSH, properly mirroring content (including deletions).

openspec/changes/simple-deployment/tasks.md

@@ -1,4 +1,4 @@
-# Tasks: add-ftps-deployment
+# Tasks: simple-deployment
 
 ## Implementation Tasks