fix: s390x architecture is not handled (#57)

The project releases s390x binaries (64bit), but not s390 (31bit). Node
reports a s390x runner correctly as "s390x", so instllations will fail
on this platform.

https://nodejs.org/api/os.html#osarch

Hence the s390 arch case has been changed to the s390x.

Signed-off-by: Magnus Kulke <magnuskulke@microsoft.com>

dist/index.js

@@ -6752,7 +6752,7 @@ function mapArch() {
             return 'ppc64le';
         case 'riscv64':
             return 'riscv64';
-        case 's390':
+        case 's390x':
             return 's390x';
         case 'arm':
             return 'armv7';

src/lib/release.ts

@@ -92,7 +92,7 @@ export function mapArch(): string {
             return 'ppc64le';
         case 'riscv64':
             return 'riscv64';
-        case 's390':
+        case 's390x':
             return 's390x';
         case 'arm':
             return 'armv7';
@@ -104,4 +104,4 @@ export function mapArch(): string {
 export function getBinaryExtension(): string {
     const platform = mapPlatform();
     return platform === 'windows' ? '.exe' : '';
-}
+}