Add OTP-26 to CI

.github/workflows/ci.yml

@@ -22,7 +22,8 @@ jobs:
         postgis:
           - "3"
         otp:
-          - "25.2"
+          - "26.0"
+          - "25.3"
           - "24.3"
         rebar3:
           - "3.20.0"