chore(ci): prevent downloads of Tact from npm in tact-template tests (#1817)

* fix: use powershell-specific `mv` command

The `mv` there is an alias to `Move-Item`, but the flags differ a bit.
For clarity, I've decided to explicitly use the underlying command.

Author: novusnota

.github/workflows/tact.yml

@@ -86,6 +86,9 @@ jobs:
           # !!!!!!! Don't forget to update test-windows below !!!!!!!
           git clone https://github.com/tact-lang/tact-template.git
           cd tact-template
+          # Hijack the dependency on Tact to avoid redundant npm downloads
+          jq 'del(.dependencies."@tact-lang/compiler")' package.json -M > temp.json
+          mv temp.json package.json
           yarn install
           yarn link @tact-lang/compiler
           yarn build
@@ -107,6 +110,9 @@ jobs:
           $ErrorActionPreference = 'Stop'
           git clone https://github.com/tact-lang/tact-template.git
           cd tact-template
+          # Hijack the dependency on Tact to avoid redundant npm downloads
+          jq 'del(.dependencies."@tact-lang/compiler")' package.json -M | Set-Content temp.json
+          Move-Item temp.json package.json -Force
           yarn install
           yarn link @tact-lang/compiler
           yarn build