Add v0.43.3 to downloads page

Author: HudsonHumphries

src/content/Downloads/downloads.yaml

@@ -1,3 +1,9 @@
+- version: 'AWS Distro for OpenTelemetry Collector Version 0.43.3'
+  releaseDate: 'May-16-2025'
+  license: 'Apache-2.0'
+  releaseNotesLink: 'https://github.com/aws-observability/aws-otel-collector/releases/tag/v0.43.3'
+  documentationLink: 'https://github.com/aws-observability/aws-otel-collector/blob/v0.43.3/README.md'
+  downloadLink: 'https://gallery.ecr.aws/aws-observability/aws-otel-collector'
 - version: 'AWS Distro for OpenTelemetry Collector Version 0.43.2'
   releaseDate: 'April-10-2025'
   license: 'Apache-2.0'