Update handbook manifest

Author: swissspidy

bin/handbook-manifest.json

@@ -143,6 +143,12 @@
         "markdown_source": "https:\/\/github.com\/wp-cli\/handbook\/blob\/main\/references\/documentation-standards.md",
         "parent": "references"
     },
+    "exit-codes": {
+        "title": "Exit Codes",
+        "slug": "exit-codes",
+        "markdown_source": "https:\/\/github.com\/wp-cli\/handbook\/blob\/main\/references\/exit-codes.md",
+        "parent": "references"
+    },
     "external-resources": {
         "title": "External Resources",
         "slug": "external-resources",
@@ -467,6 +473,12 @@
         "markdown_source": "https:\/\/github.com\/wp-cli\/handbook\/blob\/main\/guides\/running-commands-remotely.md",
         "parent": "guides"
     },
+    "security-vulnerability-reporting": {
+        "title": "Security Vulnerability Reporting for WP-CLI",
+        "slug": "security-vulnerability-reporting",
+        "markdown_source": "https:\/\/github.com\/wp-cli\/handbook\/blob\/main\/contributions\/security-vulnerability-reporting.md",
+        "parent": "contributions"
+    },
     "sharing-wp-cli-packages": {
         "title": "Sharing WP-CLI Packages",
         "slug": "sharing-wp-cli-packages",
@@ -881,4 +893,4 @@
         "markdown_source": "https:\/\/github.com\/wp-cli\/handbook\/blob\/main\/internal-api\/wp-cli-warning.md",
         "parent": "internal-api"
     }
-}
+}