Fix broken test command to build integration contracts

which is no longer build:integration but just build

.github/workflows/sync-tests.yml

@@ -54,7 +54,7 @@ jobs:
         working-directory: ./integration-tests
         run: |
           yarn
-          yarn build:integration
+          yarn build
           yarn test:sync
 
       - name: Collect docker logs on failure

CONTRIBUTING.md

@@ -189,7 +189,7 @@ Build and run the integration tests:
 
 ```bash
 cd integration-tests
-yarn build:integration
+yarn build
 yarn test:integration
 ```
 #### Running contract static analysis

integration-tests/README.md

@@ -6,7 +6,7 @@ Follow installation + build instructions in the [primary README](../README.md).
 Then, run:
 
 ```bash
-yarn build:integration
+yarn build
 ```
 
 ## Running tests