ci(github): update Elixir and OTP versions in workflow

Updated the GitHub Actions workflow to use Elixir versions 1.17.3 and 1.18.2, and OTP versions 26.2 and 27.3.

Author: rhblind

.github/workflows/elixir.yaml

@@ -20,8 +20,8 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        otp: ["24.3", "25.1"]
-        elixir: ["1.13.4", "1.14.1"]
+        otp: ["26.2", "27.3"]
+        elixir: ["1.17.3", "1.18.2"]
     steps:
       - uses: actions/checkout@v3
       - name: Set up Elixir