add ghc-9.8.4

Author: juhp

README.md

@@ -260,7 +260,8 @@ E.g., `8.10` will be resolved to `8.10.7`, and so will `8`.
 - `latest-nightly` (requires the resp. `ghcup-release-channel`, e.g. `https://ghc.gitlab.haskell.org/ghcup-metadata/ghcup-nightlies-0.0.7.yaml`)
 - `latest` (default)
 - `9.10.1` `9.10`
-- `9.8.2` `9.8`
+- `9.8.4` `9.8`
+- `9.8.2`
 - `9.8.1`
 - `9.6.6` `9.6`
 - `9.6.5`

lib/versions.json

@@ -1,6 +1,7 @@
 {
   "ghc": [
     "9.10.1",
+    "9.8.4",
     "9.8.2",
     "9.8.1",
     "9.6.6",