chore: update total skills count and add new skill for openai/skills

skvlt.yaml

@@ -1,6 +1,6 @@
 # Generated by Skills Vault: https://github.com/xixu-me/skills-vault
 total_sources: 22
-total_skills: 147
+total_skills: 148
 scope: "global"
 
 sources:
@@ -130,7 +130,7 @@ sources:
       - "humanizer-zh"
 
   "openai/skills":
-    count: 27
+    count: 28
     skills:
       - "aspnet-core"
       - "chatgpt-apps"
@@ -151,6 +151,7 @@ sources:
       - "playwright-interactive"
       - "render-deploy"
       - "screenshot"
+      - "security-best-practices"
       - "security-ownership-map"
       - "security-threat-model"
       - "sentry"