fix: add long description

Author: hmstepanek

src/data/projects/newrelic-experimental-nr-pixie-security-plugin.json

@@ -14,7 +14,7 @@
   "contributingGuideUrl": null,
   "iconUrl": "https://github.com/newrelic-experimental/nr-pixie-security-plugin/blob/main/icon.png?raw=true",
   "shortDescription": "Identifies security issues in Pixie data and sends them to New Relic.",
-  "description": "",
+  "description": "Identifies sql injection and cross site scripting attacks in Pixie data and sends them to New Relic.",
   "ossCategory": "example-code",
   "primaryLanguage": "Python",
   "projectTags": ["tools", "security", "observability"],