ci(GHC): Drop GHC version 8 and add 9.6, 9.8, 9.10, 9.12 as supported

Author: davidnbr

rollbar-client/package.yaml

@@ -5,7 +5,7 @@ license: MIT
 author: "Stack Builders Inc."
 maintainer: "David Mazarro <[email protected]>"
 copyright: "2020-present Stack Builders Inc."
-tested-with: GHC ==8.8.4, GHC ==8.10.7, GHC ==9.4.7
+tested-with: GHC ==9.4.7, GHC ==9.6.7, GHC ==9.8.4, GHC ==9.10.1, GHC ==9.12.2
 
 extra-source-files:
   - README.md