Update nimble plugin: remove SHA pin

Allow Nimble to resolve from latest HEAD rather than a pinned commit.

.claude-plugin/marketplace.json

@@ -190,21 +190,6 @@
       },
       "homepage": "https://docs.base44.com"
     },
-    {
-      "name": "bigdata-com",
-      "description": "Official Bigdata.com plugin providing financial research, analytics, and intelligence tools powered by Bigdata MCP.",
-      "author": {
-        "name": "RavenPack"
-      },
-      "category": "database",
-      "source": {
-        "source": "git-subdir",
-        "url": "Bigdata-com/bigdata-plugins-marketplace",
-        "path": "plugins/bigdata-com",
-        "ref": "main"
-      },
-      "homepage": "https://docs.bigdata.com"
-    },
     {
       "name": "box",
       "description": "Work with your Box content directly from Claude Code — search files, organize folders, collaborate with your team, and use Box AI to answer questions, summarize documents, and extract data without leaving your workflow.",
@@ -901,8 +886,7 @@
       "description": "Nimble web data toolkit — search, extract, map, crawl the web and work with structured data agents",
       "source": {
         "source": "url",
-        "url": "https://github.com/Nimbleway/agent-skills.git",
-        "sha": "cf391e95bd8ac009e3641f172434a1d130dde7fe"
+        "url": "https://github.com/Nimbleway/agent-skills.git"
       },
       "homepage": "https://docs.nimbleway.com/integrations/agent-skills/plugin-installation"
     },