Fix cache-hit state boolean cast

src/cache.ts

@@ -138,10 +138,15 @@ export async function save(id: string) {
   const primaryKey = core.getState(STATE_CACHE_PRIMARY_KEY);
   const cacheHit = core.getState(STATE_CACHE_HIT);
 
+  core.info(
+      `Cache-hit state: ${cacheHit}`
+  );
+
   if (!primaryKey) {
     core.warning('Error retrieving key from state.');
     return;
-  } else if (!!cacheHit) {
+  }
+  if (!!cacheHit || cacheHit !== 'false') {
     // no change in target directories
     core.info(
       `${cacheHit}: Cache hit occurred on the primary key ${primaryKey}, not saving cache.`