meta(repo): Refresh GitHub topics and social preview

Update the recommended GitHub topics to use all available slots with tags
that better match the repository's real tool coverage and search intent.

Refresh the social preview assets so shared links and topic pages present
current positioning and the latest skill count more clearly.

docs/maintainers/repo-growth-seo.md

@@ -34,26 +34,26 @@ Preferred social preview:
 
 Preferred topics:
 
-- `agentic-skills`
-- `agent-skills`
-- `ai-agents`
-- `ai-agent-skills`
-- `awesome-list`
-- `awesome-lists`
 - `antigravity`
 - `antigravity-skills`
-- `autonomous-coding`
 - `claude-code`
 - `claude-code-skills`
+- `cursor`
+- `cursor-skills`
 - `codex-cli`
 - `codex-skills`
-- `cursor-skills`
-- `developer-tools`
 - `gemini-cli`
 - `gemini-skills`
-- `mcp`
-- `ai-workflows`
+- `kiro`
+- `ai-agents`
+- `ai-agent-skills`
+- `agent-skills`
+- `agentic-skills`
+- `developer-tools`
 - `skill-library`
+- `ai-workflows`
+- `ai-coding`
+- `mcp`
 
 ## Release notes checklist