Restore the yarn-timeout workaround

e.g. see a recent build failures:
https://github.com/ente-io/photos-desktop/actions/runs/8996782367/job/24713793588

there was another one recently. both of these were on the Windows runner, in one
case the message was:

    info There appears to be trouble with your network connection. Retrying...

in another case the issue manifested later

    D:\a\photos-desktop\photos-desktop\web\node_modules\date-fns\formatISO\index.js:11
    /**

    SyntaxError: Invalid or unexpected token
        at internalCompileFunction (node:internal/vm:128:18)
        at wrapSafe (node:internal/modules/cjs/loader:1280:20)

but retrying fixed it, so I'm counting it as a broken package install.

desktop/.github/workflows/desktop-release.yml

@@ -40,6 +40,11 @@ jobs:
               with:
                   node-version: 20
 
+            - name: Increase yarn timeout
+              # `yarn install` times out sometimes on the Windows runner,
+              # resulting in flaky builds.
+              run: yarn config set network-timeout 900000 -g
+
             - name: Install dependencies
               run: yarn install