fix: remove incorrect JSON code block from class example in README

Robbie1977 · Robbie1977 · commit 740eb8205923 · 2025-06-16T08:57:09.000+01:00
diff --git a/README.md b/README.md
@@ -17,7 +17,6 @@ Class example:
 vfb.get_term_info('FBbt_00003748')
 ```
 ```json
-``json
 {
    "Name": "medulla",
    "Id": "FBbt_00003748",
