Security update for netty

This update for netty fixes the following issues:

- CVE-2021-21295: Fixed an improper Content-Length header field validation (bsc#1183262). :

This update was imported from the SUSE:SLE-15-SP2:Update update project.

Fixed bugs
bnc#1183262
VUL-0: CVE-2021-21295: netty: HTTP/2 request Content-Length header field is not validated by `Http2MultiplexHandler`
Selected Binaries
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