This update for netty fixes the following issues:
- CVE-2020-11612: The ZlibDecoders allow for unbounded memory allocation while decoding a byte stream (bsc#1168932)
- CVE-2021-21290: Information disclosure via the local system temporary directory (bsc#1182103)
- CVE-2021-37136: Bzip2Decoder doesn't allow setting size restrictions for decompressed data (bsc#1190610)
- CVE-2021-37137: Snappy frame decoder doesn't restrict the chunk length and may buffer skippable chunks (bsc#1190613)