Added announcements of KubeCon NA & China (#29192)

* Added announcements of KubeCon NA & China

* svg images added & required changes made

* Requested changes made

* svg images fixed

* small correction required

* added the to the message

* small correction

* Netlify build error fixed

data/announcements/scheduled.yaml

@@ -72,3 +72,25 @@ announcements:
   message: |
     4 days of incredible opportunities to collaborate, learn + share with the entire community!<br />
     May 4 - May 7, 2021.
+
+- name: Kubecon 2021 NA
+  startTime: 2021-10-01T00:00:00
+  endTime: 2021-10-16T01:00:00
+  style: "background: linear-gradient(90deg, rgb(7, 132, 111) 0%, rgb(54, 214, 183) 100%)" 
+  title: |
+    <img src="/images/announcements/kubecon-NA-2021-white.svg" style="float: right; height: 80px;" />
+    <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-north-america/"> KubeCon + CloudNativeCon North America 2021</a> <em>Los Angeles, California + Virtual</em>.
+  message: |
+    5 days of incredible opportunites to collaborate, learn + share with the entire community!<br />
+    October 11 - 15, 2021.
+
+- name: Kubecon 2021 China
+  startTime: 2021-11-30T00:00:00
+  endTime: 2021-12-10T14:00:00
+  style: "background: linear-gradient(90deg, rgb(253, 133, 1) 0%, rgb(128, 34, 196) 100%)"
+  title: |
+    <img src="/images/announcements/kubecon-China-2021-white.svg" style="float: right; height: 80px;" /> 
+    <a href="https://www.lfasiallc.com/kubecon-cloudnativecon-open-source-summit-china/"> KubeCon + CloudNativeCon + Open Source Summit China 2021</a> <em>Virtual</em>.
+  message: |
+    2 days of incredible opportunities to collaborate, learn + share with the entire community!<br />
+    December 9 + 10, 2021.