GitHub CI: Update GHC 9.8 to 9.8.4

Also bump the HLS version to 2.9.0.1 for all of the GHC versions,
including enabling HLS testing for 9.10 now that it's supported,
but leaving HLS for 9.8.4 disabled because it's too new

Author: quark17

.github/workflows/ci.yml

@@ -68,11 +68,11 @@ jobs:
       matrix:
         ghc:
           - version: 9.4.8
-            hls: 2.7.0.0
-          - version: 9.8.2
-            hls: 2.7.0.0
-          - version: 9.10.1
+            hls: 2.9.0.1
+          - version: 9.8.4
             hls:
+          - version: 9.10.1
+            hls: 2.9.0.1
     name: "Build/Test: GHC Ubuntu"
     uses: ./.github/workflows/build-and-test-ubuntu.yml
     with:
@@ -86,11 +86,11 @@ jobs:
       matrix:
         ghc:
           - version: 9.4.8
-            hls: 2.7.0.0
-          - version: 9.8.2
-            hls: 2.7.0.0
-          - version: 9.10.1
+            hls: 2.9.0.1
+          - version: 9.8.4
             hls:
+          - version: 9.10.1
+            hls: 2.9.0.1
     name: "Build/Test: GHC macOS"
     uses: ./.github/workflows/build-and-test-macos.yml
     with: