chore: update GitHub Actions

Author: hauleth

.github/workflows/elixir.yml

@@ -12,11 +12,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        otp_version: ['24.0', '23.3', '22.3']
-        elixir_version: ['1.10.3', '1.11.4', '1.12.1']
-        exclude:
-          - otp_version: '24.0'
-            elixir_version: '1.10.3'
+        otp_version: ['24', '25']
+        elixir_version: ['1.13', '1.14']
+        include:
+          - otp_version: '26'
+            elixir_version: '1.14'
     steps:
     - uses: actions/checkout@v2
     - name: Set up Elixir