Refresh cache of windows-cabal job

Author: jneira

.azure/windows-cabal.yml

@@ -20,7 +20,7 @@ jobs:
   steps:
   - task: Cache@2
     inputs:
-      key: '"cabal" | "$(Agent.OS)" | "$(CABAL_VERSION)" | "$(GHC_VERSION)" | $(Build.SourcesDirectory)/cabal.project | $(Build.SourcesDirectory)/haskell-ide-engine.cabal | $(Build.SourcesDirectory)/hie-plugin-api/hie-plugin-api.cabal'
+      key: '"cabal-v2" | "$(Agent.OS)" | "$(CABAL_VERSION)" | "$(GHC_VERSION)" | $(Build.SourcesDirectory)/cabal.project | $(Build.SourcesDirectory)/haskell-ide-engine.cabal | $(Build.SourcesDirectory)/hie-plugin-api/hie-plugin-api.cabal'
       path: .azure-cache
       cacheHitVar: CACHE_RESTORED
     displayName: "Download cache"