use release testnode (#359)

Author: godzillaba

.github/workflows/contract-tests.yml

@@ -169,7 +169,7 @@ jobs:
           no-token-bridge: true
           no-l3-token-bridge: true
           nitro-contracts-branch: '${{ github.event.pull_request.head.sha || github.sha }}'
-          nitro-testnode-ref: v3-support
+          nitro-testnode-ref: release
 
       - name: Setup node/yarn
         uses: actions/setup-node@v3
@@ -202,7 +202,7 @@ jobs:
           no-token-bridge: true
           no-l3-token-bridge: true
           nitro-contracts-branch: '${{ github.event.pull_request.head.sha || github.sha }}'
-          nitro-testnode-ref: v3-support
+          nitro-testnode-ref: release
 
       - name: Setup node/yarn
         uses: actions/setup-node@v3
@@ -234,7 +234,7 @@ jobs:
           args: --l3-fee-token --l3-fee-token-pricer --l3-fee-token-decimals 6
           no-token-bridge: true
           no-l3-token-bridge: true
-          nitro-testnode-ref: v3-support
+          nitro-testnode-ref: release
           nitro-contracts-branch: '${{ github.event.pull_request.head.sha || github.sha }}'
 
       - name: Setup node/yarn