fix: correct SharePoint file download endpoint path (#139)

Fixes #137 - download-onedrive-file-content was returning 404 for SharePoint files

Root cause: The endpoint path pattern included an incorrect `/children/{driveItem-id1}`
segment that doesn't match the Microsoft Graph API specification.

Changed from:
/drives/{drive-id}/items/{driveItem-id}/children/{driveItem-id1}/content

To correct path:
/drives/{drive-id}/items/{driveItem-id}/content

Tested with SharePoint Internal site - file downloads now work correctly.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <[email protected]>

Author: BenGWeeks

src/endpoints.json

@@ -198,7 +198,7 @@
     "scopes": ["Files.Read"]
   },
   {
-    "pathPattern": "/drives/{drive-id}/items/{driveItem-id}/children/{driveItem-id1}/content",
+    "pathPattern": "/drives/{drive-id}/items/{driveItem-id}/content",
     "method": "get",
     "toolName": "download-onedrive-file-content",
     "scopes": ["Files.Read"]