try disabling gpg to avoid frequent erros (see swift-actions#710)

Author: davidkoski

src/linux-install.ts

@@ -18,12 +18,12 @@ export async function install(version: string, system: System) {
   if (swiftPath === null || swiftPath.trim().length == 0) {
     core.debug(`No matching installation found`);
 
-    await setupKeys();
+    // await setupKeys();
 
     const swiftPkg = swiftPackage(version, system);
     let { pkg, signature } = await download(swiftPkg);
 
-    await verify(signature, pkg);
+    // await verify(signature, pkg);
 
     swiftPath = await unpack(pkg, swiftPkg.name, version, system);
   } else {