chore(jmespath): add contain() examples

knowledge base/jmespath.md

@@ -4,6 +4,7 @@
 
 1. [TL;DR](#tldr)
 1. [Further readings](#further-readings)
+   1. [Sources](#sources)
 
 ## TL;DR
 
@@ -14,7 +15,10 @@ az devops user list --org 'https://dev.azure.com/organizationName' \
     items[?
       startsWith(user.principalName, 'yourNameHere') &&
       \! contains(accessLevel.licenseDisplayName, 'Test plans')
-    ].user.displayName"
+    ].user.displayName
+  "
+aws … --query "locations[?name.contains(@, `le`)]"
+aws … --query "locations[?name.contains(@, `ue`) || name.contains(@, `ia`)]"
 
 # Print an object with specific keys and values from the input.
 az disk-encryption-set show --ids 'id' \
@@ -27,11 +31,20 @@ az disk-encryption-set show --ids 'id' \
 ## Further readings
 
 - [Website]
+- [Specifications]
+
+### Sources
+
+- [Filtering JMESPath with contains]
 
 <!--
-  References
+  Reference
+  ═╬═Time══
   -->
 
 <!-- Upstream -->
 [specifications]: https://jmespath.org/specification.html
 [website]: https://jmespath.org/
+
+<!-- Others -->
+[filtering jmespath with contains]: https://stackoverflow.com/questions/50774937/filtering-jmespath-with-contains#50831828