Log cache version requested

src/cache.ts

@@ -256,7 +256,11 @@ async function restoreCacheV2(
     const response = await twirpClient.GetCacheEntryDownloadURL(request)
 
     if (!response.ok) {
-      core.debug(`Cache not found for keys: ${keys.join(', ')}`)
+      core.debug(
+        `Cache not found for version ${request.version} of keys: ${keys.join(
+          ', '
+        )}`
+      )
       return undefined
     }