card: brand GPTKB 2.0 (matches the papers)

README.md

@@ -8,12 +8,12 @@ tags:
   - n-triples
   - parquet
   - llm-generated
-pretty_name: GPTKB v2
+pretty_name: GPTKB 2.0
 size_categories:
   - 10M<n<100M
 ---
 
-# GPTKB v2
+# GPTKB 2.0
 
 Browse, query or ask the full knowledge base at
 **[gptkb.org](https://gptkb.org/)**.
@@ -83,7 +83,7 @@ IRIs the file already carries.
 
 ## The full record (`gptkb_v2.0.1_full_record/`)
 
-A fact in GPTKB v2 has **six** terms, not three: alongside the
+A fact in GPTKB 2.0 has **six** terms, not three: alongside the
 disambiguated subject, predicate and object, it records the *wording*
 each was stated with, and the provenance of how that wording was
 resolved. A triple has nowhere to put either. In the RDF export,