update cache handler version in example (#65330)

### What?
Update the cache-handler package to the latest and changed logic for
opting out of caching during build.

### Why?
The current implementation in the cache-handler-redis example requires
an environment variable check for `REDIS_AVAILABLE` to determine if the
server has already started in order to opt out of caching during build.
This update leverages the `NEXT_PHASE` environment variable instead.

### How?
This updates the environment variable check to leverage the `NEXT_PHASE`
variable so a user doesn't have to manage a new environment variable.

---------

Co-authored-by: JJ Kasper <jj@jjsweb.site>

examples/cache-handler-redis/cache-handler.js

@@ -1,7 +1,8 @@
-const { IncrementalCache } = require("@neshca/cache-handler");
+const { CacheHandler } = require("@neshca/cache-handler");
 const createRedisCache = require("@neshca/cache-handler/redis-stack").default;
 const createLruCache = require("@neshca/cache-handler/local-lru").default;
 const { createClient } = require("redis");
+const { PHASE_PRODUCTION_BUILD } = require("next/constants");
 
 const client = createClient({
   url: process.env.REDIS_URL ?? "redis://localhost:6379",
@@ -11,7 +12,7 @@ client.on("error", (error) => {
   console.error("Redis error:", error.message);
 });
 
-IncrementalCache.onCreation(async () => {
+CacheHandler.onCreation(async () => {
   // read more about TTL limitations https://caching-tools.github.io/next-shared-cache/configuration/ttl
   function useTtl(maxAge) {
     const evictionAge = maxAge * 1.5;
@@ -21,7 +22,7 @@ IncrementalCache.onCreation(async () => {
 
   let redisCache;
 
-  if (process.env.REDIS_AVAILABLE) {
+  if (PHASE_PRODUCTION_BUILD !== process.env.NEXT_PHASE) {
     await client.connect();
 
     redisCache = await createRedisCache({
@@ -41,4 +42,4 @@ IncrementalCache.onCreation(async () => {
   };
 });
 
-module.exports = IncrementalCache;
+module.exports = CacheHandler;

examples/cache-handler-redis/package.json

@@ -11,7 +11,7 @@
     "react-dom": "^18.2.0"
   },
   "devDependencies": {
-    "@neshca/cache-handler": "^0.6",
+    "@neshca/cache-handler": "^1.3.1",
     "@neshca/json-replacer-reviver": "^1",
     "@types/node": "^20",
     "@types/react": "^18",