Update azure-pipelines.yml

Author: cristianoc

azure-pipelines.yml

@@ -102,9 +102,9 @@ jobs:
 
       - script: npm install -g esy
         displayName: "install esy"
-      - script: esy install
+      - script: esy @4061 install
         displayName: "esy install"
-      - script: esy build
+      - script: esy @4061 build
         displayName: "esy build"
       # - script: |
       #     node scripts/buildocaml.js