Fix status badge for ECDSA contracts build

There was a mistake in the previous commit that updated the badge. We're fixing
it now.

solidity/ecdsa/README.adoc

@@ -3,7 +3,7 @@
 
 = Keep ECDSA v2
 
-https://github.com/keep-network/keep-core/.github/workflows/solidity-test.yml[image:https://img.shields.io/github/workflow/status/keep-network/sortition-pools/Test%20Solidity?event=schedule&label=ECDSA%20contracts%20build[Solidity tests status]]
+https://github.com/keep-network/keep-core/actions/workflows/contracts-ecdsa.yml[image:https://img.shields.io/github/workflow/status/keep-network/keep-core/Solidity%20ECDSA/main?event=push&label=ECDSA%20contracts%20build[ECDSA contracts build status]]
 
 The Keep Network offers threshold ECDSA protocol to generate ECDSA wallets
 without any single signer having access to the corresponding private key. This