fix: replace YAML-conflicting markdown separators in release workflow

Changed Markdown horizontal rules from "---" to "___" in heredoc content
to prevent YAML parser conflicts. The "---" string at the start of a line
is a YAML document separator which causes parsing issues even inside bash
heredocs within GitHub Actions workflows.

Root cause:
- Lines 151 and 226 contained "---" Markdown horizontal rules
- YAML parsers interpret "---" as document separators
- This prevented workflow jobs from executing (no jobs scheduled)
- Changed to "___" which creates identical Markdown output

Impact:
- Fixes workflow run 18804889309 where no jobs executed
- Fixes workflow run 18804651253 with same issue
- Both "___" and "---" render as horizontal rules in Markdown
- Workflow should now properly detect version changes and execute all jobs

Related: Commit 79ef853 which removed emoji from heredoc

Concieved by Romuald Członkowski - www.aiadvisors.pl/en

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

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.22.6",
+  "version": "2.22.5",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

package.runtime.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp-runtime",
-  "version": "2.22.6",
+  "version": "2.22.5",
   "description": "n8n MCP Server Runtime Dependencies Only",
   "private": true,
   "dependencies": {