frontend: rephase

web/src/pages/open-source-heroes/_sections/0-heading.tsx

@@ -48,7 +48,7 @@ function PrimaryHeading ({ loading, onClickAction }: { loading: boolean, onClick
               TiDB Serverless Credits for Open Source Heroes
             </HeadingTitle>
             <HeadingDescription>
-              TiDB loves open-source. We contribute code, sponsor projects arround open source community, such as OssInsight, and deeply appreciate developers who actively contribute to the communityhave.
+              TiDB loves open-source. We contribute code, sponsor projects around open source community, such as OssInsight, and deeply appreciate developers who actively contribute to the community.
               <br />
               As a token of our appreciation, we&#39;re offering up to $1000 in free TiDB Serverless credits to fuel open-source hero&#39;s next big idea.
             </HeadingDescription>

web/src/pages/open-source-heroes/_sections/6-legal.mdx

@@ -8,7 +8,7 @@ The campaign is open to anyone, except PingCAP employees, contractors, affiliate
 All contributions to the TiDB project must comply with our Contributor License Agreement (CLA) (https://cla.pingcap.net/pingcap/tidb). By contributing, you give PingCAP permission to use, modify, and share your work.
 
 ### Rewards
-TiDB Cloud credits are valid for 12 months and cannot be transferred, refunded, or exchanged for cash. PingCAP may disqualify participants who violate these terms.
+TiDB Cloud credits are valid for 180 days and cannot be transferred, refunded, or exchanged for cash. PingCAP may disqualify participants who violate these terms.
 
 ### Privacy
 By participating, you agree that PingCAP can use your personal data according to our Privacy Policy (https://www.pingcap.com/privacy-policy/). Your data will only be used to run this campaign and won't be shared without your consent, except as required by law.