chore: add nvim 0.9 ci (#496)

Author: Conni2461

.github/workflows/default.yml

@@ -15,7 +15,9 @@ jobs:
           - os: ubuntu-22.04
             rev: v0.7.2/nvim-linux64.tar.gz
           - os: ubuntu-22.04
-            rev: v0.8.2/nvim-linux64.tar.gz
+            rev: v0.8.3/nvim-linux64.tar.gz
+          - os: ubuntu-22.04
+            rev: v0.9.0/nvim-linux64.tar.gz
     steps:
       - uses: actions/checkout@v3
       - run: date +%F > todays-date