Revert "[ci][windows] switch to nsis 3.06.1"

This reverts commit ec8c44d1c71b07e71397605ad6c50ce9e576a061.

extra/azure-pipelines/build-windows.yml

@@ -25,7 +25,7 @@ jobs:
     steps:
       - checkout: self
         submodules: recursive
-      - powershell: choco install --no-progress nsis.portable --version 3.06.1 -y
+      - powershell: choco install --no-progress nsis.portable --version 3.02 -y
         displayName: choco install nsis
       - powershell: choco install --no-progress curl wget 7zip.portable -y
         displayName: choco install things