chore(deps): bump software.amazon.awssdk:bom (#328)

Bumps software.amazon.awssdk:bom from 2.19.1 to 2.20.128.

---
updated-dependencies:
- dependency-name: software.amazon.awssdk:bom
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

DynamoDbEncryption/runtimes/java/build.gradle.kts

@@ -72,7 +72,7 @@ dependencies {
     implementation("software.amazon.smithy.dafny:conversion:0.1")
     implementation("software.amazon.cryptography:aws-cryptographic-material-providers:1.0.0")
 
-    implementation(platform("software.amazon.awssdk:bom:2.19.1"))
+    implementation(platform("software.amazon.awssdk:bom:2.20.128"))
     implementation("software.amazon.awssdk:dynamodb")
     implementation("software.amazon.awssdk:dynamodb-enhanced")
     implementation("software.amazon.awssdk:kms")