fix: skip kcov on non linux

Author: aminya

src/kcov/__tests__/kcov.test.ts

@@ -6,7 +6,7 @@ import { info } from "@actions/core"
 
 jest.setTimeout(300000)
 describe("setup-Kcov", () => {
-  if (process.platform !== "win32") {
+  if (process.platform !== "linux") {
     it.todo("should setup kcov on non-Windows")
     return
   }

src/kcov/kcov.ts

@@ -63,7 +63,7 @@ async function buildKcov(file: string, dest: string) {
 }
 
 export async function setupKcov(versionGiven: string, setupDir: string, arch: string) {
-  if (process.platform !== "win32") {
+  if (process.platform !== "linux") {
     info("Kcov is not supported on non-linux")
     return
   }