Layer5 added as a istio partner

Signed-off-by: gunjanmimo <gunjan.mtbpaul@gmail.com>

Author: dANGsx

content/en/about/community/partners/index.md

@@ -23,6 +23,7 @@ Istio benefits from an ecosystem of great partners. Check 'em out and learn how
     {{< company_logo link="https://www.huaweicloud.com" logo="./huawei.png" alt="Huawei Cloud" >}}
     {{< company_logo link="https://www.ibm.com/cloud/" logo="./ibm-cloud.svg" alt="IBM Cloud" tagline="Built for all your applications. AI ready. Secure to the core." >}}
     {{< company_logo link="https://github.com/knative/docs" logo="./knative.png" alt="Knative" >}}
+    {{< company_logo link="https://layer5.io" logo="./assets/images/layer5/layer5-tag-community-white-bg.png" alt="Layer5" tagline="A multi-service mesh management plane" >}}
     {{< company_logo link="https://pivotal.io" logo="./pivotal.svg" alt="Pivotal" tagline="The way the future gets built" >}}
     {{< company_logo link="https://www.redhat.com" logo="./redhat.svg" alt="Red Hat" tagline="We make open source technologies for the enterprise" >}}
     {{< company_logo link="https://www.solarwinds.com" logo="./solarwinds.png" alt="SolarWinds" tagline="Solve your toughest IT management problem, today" >}}

content/zh/docs/tasks/security/authentication/_index.md

@@ -1,5 +1,5 @@
 ---
-title: Authentication
-description: Controlling mutual TLS and end-user authentication for mesh services.
+title: 认证
+description: 管控网格服务间的双向TLS和终端用户的身份认证。
 weight: 10
 ---