Update module github.com/DataDog/zstd to v1.5.5

This MR contains the following updates:

Package	Type	Update	Change
github.com/DataDog/zstd	require	patch	v1.5.3-0.20220606203749-fd035e54e312 -> v1.5.5

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This MR has been generated by Renovate Bot.

restored source branch renovate/github.com-datadog-zstd-1.x

mentioned in issue #2

added 4 commits

• b5a1ff62...609b9e05 - 3 commits from branch master
• d3661a19 - Update module github.com/DataDog/zstd to v1.5.5

Compare with previous version

merged

mentioned in commit ef787914