Dev Containers: Use HLS v2.9.0.1 with GHC v9.6.6

- HLS v2.7.0.0 does not build with GHC v9.6.6

.devcontainer/VERSION_MATRIX.md

@@ -6,7 +6,7 @@
 |:------------------------------|:----------|:----------|:--------------------------------------------------- |
 | latest<br>9.10.1<br>9.10<br>9 | 3.12.1.0  | ≥ 2.13.1  | latest<br>2.9.0.1<br>2.9.0.0                        |
 | 9.8.2<br>9.8                  | 3.10.3.0  | ≥ 2.13.1  | 2.9.0.1<br>2.9.0.0<br>2.8.0.0<br>2.7.0.0<br>2.6.0.0 |
-| 9.6.6<br>9.6                  | 3.10.3.0  | ≥ 2.13.1  | 2.9.0.1<br>2.7.0.0                                  |
+| 9.6.6<br>9.6                  | 3.10.3.0  | ≥ 2.13.1  | 2.9.0.1                                             |
 
 [^1]: built-in version; see [GHC musl > Version Matrix](../VERSION_MATRIX.md)
 

.devcontainer/ghc-9.6/devcontainer.json

@@ -5,7 +5,7 @@
     "context": "..",
     "args": {
       "GHC_VERSION": "9.6",
-      "HLS_VERSION": "2.7.0.0",
+      "HLS_VERSION": "2.9.0.1",
       "STACK_VERSION": "2.15.5",
       "USE_ZSH_FOR_ROOT": "unset-to-use-ash",
       "SET_LANG": "C.UTF-8",