Fix GNUtar path

src/internal/cacheUtils.ts

@@ -117,7 +117,7 @@ export function getCacheFileName(compressionMethod: CompressionMethod): string {
 }
 
 export async function isGnuTarInstalled(): Promise<boolean> {
-  const gnuTar = `${process.env['windir']}\\Program Files\\Git\\usr\\bin\\tar.exe`
+  const gnuTar = `${process.env['PROGRAMFILES']}\\Git\\usr\\bin\\tar.exe`
   const versionOutput = await getVersion('tar')
   return (
     versionOutput.toLowerCase().includes('gnu tar') || fs.existsSync(gnuTar)

src/internal/tar.ts

@@ -14,7 +14,7 @@ async function getTarPath(
   switch (process.platform) {
     case 'win32': {
       const systemTar = `${process.env['windir']}\\System32\\tar.exe`
-      const gnuTar = `${process.env['windir']}\\Program Files\\Git\\usr\\bin\\tar.exe`
+      const gnuTar = `${process.env['PROGRAMFILES']}\\Git\\usr\\bin\\tar.exe`
       if (existsSync(gnuTar)) {
         // Making GNUtar + zstd as default on windows
         args.push('--force-local')