Change how we print installed Elixir version (#36)

src/setup-beam.js

@@ -144,11 +144,13 @@ async function getElixirVersion(exSpec0, otpVersion) {
     if (elixirVersions.get(elixirVersion).includes(otpMatch[1])) {
       // ... and it's available: use it!
       elixirVersionWithOTP = `${elixirVersion}-otp-${otpVersionMajor}`
-      core.info(`Using Elixir / -otp- version ${elixirVersionWithOTP}`)
+      core.info(
+        `Using Elixir ${elixirVersion} (built for OTP ${otpVersionMajor})`,
+      )
     } else {
       // ... and it's not available: fallback to the "generic" version (v1.4.5 only).
       elixirVersionWithOTP = elixirVersion
-      core.info(`Using Elixir ${elixirVersionWithOTP}`)
+      core.info(`Using Elixir ${elixirVersion}`)
     }
   } else {
     throw new Error(