refactor: use core.getBooleanInput()

src/setup-dotnet.ts

@@ -38,9 +38,9 @@ export async function run() {
     }
 
     if (versions.length) {
-      const includePrerelease: boolean =
-        (core.getInput('include-prerelease') || 'false').toLowerCase() ===
-        'true';
+      const includePrerelease: boolean = core.getBooleanInput(
+        'include-prerelease'
+      );
       let dotnetInstaller!: installer.DotnetCoreInstaller;
       for (const version of new Set<string>(versions)) {
         dotnetInstaller = new installer.DotnetCoreInstaller(