ci: update action versions

.github/workflows/tests.yml

@@ -7,7 +7,7 @@ jobs:
     name: Luacheck
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
 
       - name: Prepare
         run: |
@@ -23,25 +23,25 @@ jobs:
     name: StyLua
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Stylua
-        uses: JohnnyMorganz/stylua-action@1.0.0
+        uses: JohnnyMorganz/stylua-action@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          version: v0.14.3
+          version: v0.15.2
           args: --check .
 
   run_tests:
     strategy:
       matrix:
-        nvim_tag: [v0.7.0, v0.7.2, v0.8.0]
+        nvim_tag: [v0.7.0, v0.7.2, v0.8.0, v0.8.1]
 
     name: Run tests
     runs-on: ubuntu-22.04
     env:
       NVIM_TAG: ${{ matrix.nvim_tag }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Install Neovim and dependencies
         run: |

.github/workflows/update-readme.yml

@@ -5,9 +5,9 @@ on: push
 jobs:
   update-readme:
     name: Update README
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
 
       - name: Update README
         env: