GHC 9.14 compat: replace async with text in a test for haddock-project

the test was using async from hackage as an exmaple global package.
Currently, async has a too restrictive upper bound on base. It'll be
more robust to rely on a boot package instead. Ideally we'd not rely on
anything from Hackage in tests, but that's an issue for another day.

Author: ulysses4ever

cabal-install/tests/IntegrationTests2.hs

@@ -2811,7 +2811,7 @@ testHaddockProjectDependencies config = do
         ["all"]
         defaultGlobalFlags{globalStoreDir = Flag "store"}
 
-      let haddock = "haddocks" </> "async" </> "async.haddock"
+      let haddock = "haddocks" </> "text" </> "text.haddock"
       hasHaddock <- doesFileExist haddock
       unless hasHaddock $ assertFailure ("File `" ++ haddock ++ "` does not exist.")
     cleanHaddockProject testdir

cabal-install/tests/IntegrationTests2/haddock-project/dependencies/a.cabal

@@ -5,6 +5,6 @@ cabal-version: >= 1.10
 
 library
     exposed-modules:  MyLib
-    build-depends:    base, async
+    build-depends:    base, text
     hs-source-dirs:   src
     default-language: Haskell2010

cabal-install/tests/IntegrationTests2/haddock-project/dependencies/cabal.project

@@ -4,5 +4,5 @@ jobs: 1
 
 documentation: True
 
-package async
+package text
   documentation: True

cabal-install/tests/IntegrationTests2/haddock-project/dependencies/src/MyLib.hs

@@ -1,6 +1,6 @@
 module MyLib (someFunc) where
 
-import Control.Concurrent.Async
+import qualified Data.Text as T
 
-someFunc :: IO (Async ())
-someFunc = async (return ())
+someFunc :: IO ()
+someFunc = print . T.unpack . T.pack $ "Hello, World!"