Bump @aws-sdk/lib-dynamodb from 3.775.0 to 3.839.0

---
updated-dependencies:
- dependency-name: "@aws-sdk/lib-dynamodb"
  dependency-version: 3.839.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

lambdas/backend-api/package.json

@@ -4,7 +4,7 @@
     "@aws-sdk/client-dynamodb": "3.775.0",
     "@aws-sdk/client-s3": "3.775.0",
     "@aws-sdk/client-sqs": "3.775.0",
-    "@aws-sdk/lib-dynamodb": "3.775.0",
+    "@aws-sdk/lib-dynamodb": "3.839.0",
     "@aws-sdk/util-dynamodb": "3.775.0",
     "csv-parse": "^5.6.0",
     "handlebars": "^4.7.8",

lambdas/sftp-letters/package.json

@@ -3,7 +3,7 @@
     "@aws-sdk/client-dynamodb": "3.775.0",
     "@aws-sdk/client-s3": "3.775.0",
     "@aws-sdk/client-ssm": "3.775.0",
-    "@aws-sdk/lib-dynamodb": "3.775.0",
+    "@aws-sdk/lib-dynamodb": "3.839.0",
     "csv-parse": "^5.6.0",
     "csv-stringify": "^6.4.4",
     "date-fns": "^4.1.0",