chore: release 1.3.18

Author: aws-sdk-kotlin-ci

.changes/2daf7e93-a9e4-4c6b-9c0c-b083a1864c09.json

@@ -1,5 +1,14 @@
 # Changelog
 
+## [1.3.18] - 10/31/2024
+
+### Fixes
+* [#1214](https://github.com/awslabs/aws-sdk-kotlin/issues/1214) Add support for connection idle monitoring for OkHttp via the engine config parameter `connectionIdlePollingInterval`. Monitoring is disabled by default to match previous behavior. This monitoring will switch to enabled by default in an upcoming minor version release.
+
+### Miscellaneous
+* Add `Accept` header to all RpcV2Cbor requests
+* Correct documentation for `ByteStream.writeToOutputStream`, add `ByteStream.appendToOutputStream`
+
 ## [1.3.17] - 10/16/2024
 
 ### Miscellaneous

.changes/386353e6-e3cc-4561-bfd6-9763d3ac033b.json

@@ -13,7 +13,7 @@ kotlinx.atomicfu.enableNativeIrTransformation=false
 org.gradle.jvmargs=-Xmx2G -XX:MaxMetaspaceSize=1G
 
 # SDK
-sdkVersion=1.3.18-SNAPSHOT
+sdkVersion=1.3.18
 
 # codegen
-codegenVersion=0.33.18-SNAPSHOT
+codegenVersion=0.33.18