Add 8.4.4, 8.2.2 and 8.0.2 to old-ghcs validation

We were missing coverage from running tests with these ghc versions.

Author: mpickering

.github/workflows/validate.yml

@@ -67,6 +67,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
+        # If you remove something from here.. then add it to the old-ghcs job.
         ghc: ["9.8.1", "9.6.3", "9.4.8", "9.2.8", "9.0.2", "8.10.7", "8.8.4", "8.6.5"]
         exclude:
           # corrupts GHA cache or the fabric of reality itself, see https://github.com/haskell/cabal/issues/8356
@@ -236,7 +237,7 @@ jobs:
         # they are not available in ppa/hvr. The ghcup installation
         # needs `sudo` which is not available in the xenial container
         ghc: ["8.8.4"]
-        extra-ghc: ["7.10.3", "7.8.4", "7.6.3", "7.4.2", "7.2.2", "7.0.4"]
+        extra-ghc: ["8.4.4", "8.2.2", "8.0.2", "7.10.3", "7.8.4", "7.6.3", "7.4.2", "7.2.2", "7.0.4"]
 
     steps: