ci: update build matrix

Author: bitwalker

.github/workflows/elixir.yml

@@ -9,13 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        otp: ['24.2', '25']
-        elixir: ['1.12.3', '1.13.3', '1.14.0']
-        exclude:
-          - otp: '25'
-            elixir: '1.12.3'
+        otp: ['25', 'latest']
+        elixir: ['1.17', '1.18', 'latest']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: erlef/setup-beam@v1
         with:
           otp-version: ${{matrix.otp}}