Update postman plugin to latest version

Bumps pinned SHA from 0714280 (Feb 20) to 40b11ac (Mar 26).
New commit adds private network search support.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude-plugin/marketplace.json

@@ -125,6 +125,16 @@
         "community-managed"
       ]
     },
+    {
+      "name": "autofix-bot",
+      "description": "Code review agent that detects security vulnerabilities, code quality issues, and hardcoded secrets. Combines 5,000+ static analyzers to scan your code and dependencies for CVEs.",
+      "author": {
+        "name": "DeepSource Corp"
+      },
+      "category": "security",
+      "source": "./external_plugins/autofix-bot",
+      "homepage": "https://github.com/anthropics/claude-plugins-public/tree/main/external_plugins/autofix-bot"
+    },
     {
       "name": "aws-serverless",
       "description": "Design, build, deploy, test, and debug serverless applications with AWS Serverless services.",
@@ -454,7 +464,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/tryflint/claude-code-plugin.git",
-        "sha": "8f57ef474f59817c7e5930dd6c295232d43c3711"
+        "sha": "f3d56e33ed2fb3ed9b4f02e0fc65d0a79b24bf4d"
       },
       "homepage": "https://www.tryflint.com/docs/claude-code-plugin"
     },
@@ -913,7 +923,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/Postman-Devrel/postman-claude-code-plugin.git",
-        "sha": "0714280351c1a137e79aad465a66730511ffbd57"
+        "sha": "40b11ac3466c500cf4625ac016d5c01cd00046f4"
       },
       "homepage": "https://learning.postman.com/docs/developer/postman-mcp-server/"
     },