maybe this one will cure all my problems in life?

.github/workflows/tests.yml

@@ -30,9 +30,14 @@ jobs:
           check-latest: false
 
       - name: Install Neovim
-        uses: MunifTanjim/setup-neovim-action@v1
-        with:
-          tag: ${{ matrix.version }}
+        shell: bash
+        run: |
+          mkdir -p /tmp/nvim
+          wget -q https://github.com/neovim/neovim/releases/download/${{ matrix.version }}/nvim-linux-x86_64.appimage -O /tmp/nvim/nvim.appimage
+          cd /tmp/nvim
+          chmod a+x ./nvim.appimage
+          ./nvim.appimage --appimage-extract
+          echo "/tmp/nvim/squashfs-root/usr/bin/" >> $GITHUB_PATH
 
       - uses: actions/checkout@v3