Update ci.yml

Author: greggh

.github/workflows/ci.yml

@@ -49,7 +49,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        neovim-version: [v0.8.0, v0.9.0, stable, nightly]
+        neovim-version: [stable, nightly]
 
     name: Test with Neovim ${{ matrix.neovim-version }}
     steps: