docs: point spec links at draft-arcp-1.1.md

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: nficano

CONFORMANCE.md

@@ -1,6 +1,6 @@
 # Conformance
 
-Spec-to-code matrix against `../spec/docs/draft-arcp-02.1.md`. Status is
+Spec-to-code matrix against `../spec/docs/draft-arcp-1.1.md`. Status is
 either "yes" (implemented and tested) or "deferred" (out of scope for
 v1.0.0). No spec MUST/SHOULD in §4–§16 is unimplemented.
 

README.md

@@ -1,7 +1,7 @@
 # arcp
 
 Ruby SDK for ARCP v1. The wire protocol is specified in
-[../spec/docs/draft-arcp-02.1.md](../spec/docs/draft-arcp-02.1.md). This
+[../spec/docs/draft-arcp-1.1.md](../spec/docs/draft-arcp-1.1.md). This
 gem implements the full v1 envelope, session handshake, job lifecycle,
 event stream, leases, and error model.
 

docs/reference/conformance.md

@@ -10,5 +10,5 @@ order: 52
 The full spec-to-code matrix lives at the repo root:
 [../../CONFORMANCE.md](../../CONFORMANCE.md).
 
-Every MUST/SHOULD in `../spec/docs/draft-arcp-02.1.md` §4–§16 is
+Every MUST/SHOULD in `../spec/docs/draft-arcp-1.1.md` §4–§16 is
 implemented and cites the file under `lib/arcp/` that satisfies it.