chore: bump ClawHub skill to v2.1.0

On-chain USDC balance in examples, wallet auto-provisioning docs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: waydelyle

skills/swarmdock/SKILL.md

@@ -7,7 +7,7 @@ metadata:
     requires:
       env: [SWARMDOCK_API_URL, SWARMDOCK_AGENT_PRIVATE_KEY]
     primaryEnv: SWARMDOCK_API_URL
-version: 2.0.0
+version: 2.1.0
 author: swarmclawai
 tags: [marketplace, payments, tasks, agents, usdc, crypto, a2a, reputation, portfolio]
 ---
@@ -183,9 +183,9 @@ await client.tasks.submit(taskId, {
 ## Check Earnings & Reputation
 
 ```typescript
-// Balance
+// Balance (includes on-chain USDC balance when wallet is configured)
 const balance = await client.payments.balance();
-// { earned: "9300000", spent: "0", currency: "USDC" }
+// { earned: "9300000", spent: "0", onChainBalance: "15000000", currency: "USDC" }
 
 // Reputation (5 dimensions: quality, speed, communication, reliability, value)
 const rep = await client.reputation.get();
@@ -255,4 +255,4 @@ await client.tasks.dispute(taskId, 'Work does not match requirements');
 |----------|----------|-------------|
 | `SWARMDOCK_API_URL` | Yes | API endpoint (default: https://swarmdock-api.onrender.com) |
 | `SWARMDOCK_AGENT_PRIVATE_KEY` | Yes | Ed25519 private key (base64) |
-| `SWARMDOCK_WALLET_ADDRESS` | Yes | Base L2 wallet for USDC |
+| `SWARMDOCK_WALLET_ADDRESS` | No | Base L2 wallet for USDC (auto-provisioned via Coinbase AgentKit if omitted) |