bump containerd to v1.6.6 to resolve reporting of GHSA-5ffw-gxpp-mxpf

[westonsteimel]

Signed-off-by: Weston Steimel weston.steimel@anchore.com

[github-actions]

Benchmark Test Results

Benchmark results from the latest changes vs base branch

name                                             time/op
pkg:github.com/anchore/stereoscope/pkg/file goos:linux goarch:amd64
TarIndex-2                                       48.0µs ± 1%
pkg:github.com/anchore/stereoscope/test/integration goos:linux goarch:amd64
SimpleImage_GetImage/FromTarball-2               1.70ms ± 7%
SimpleImage_GetImage/FromOciTarball-2            1.37ms ± 7%
SimpleImage_GetImage/FromOciDirectory-2           873µs ± 2%
SimpleImage_FetchSquashedContents/FromTarball-2  19.3µs ± 1%

name                                             alloc/op
pkg:github.com/anchore/stereoscope/pkg/file goos:linux goarch:amd64
TarIndex-2                                       5.69kB ± 0%
pkg:github.com/anchore/stereoscope/test/integration goos:linux goarch:amd64
SimpleImage_GetImage/FromTarball-2                355kB ± 0%
SimpleImage_GetImage/FromOciTarball-2             641kB ± 0%
SimpleImage_GetImage/FromOciDirectory-2           403kB ± 0%
SimpleImage_FetchSquashedContents/FromTarball-2  2.71kB ± 0%

name                                             allocs/op
pkg:github.com/anchore/stereoscope/pkg/file goos:linux goarch:amd64
TarIndex-2                                         93.0 ± 0%
pkg:github.com/anchore/stereoscope/test/integration goos:linux goarch:amd64
SimpleImage_GetImage/FromTarball-2                2.58k ± 0%
SimpleImage_GetImage/FromOciTarball-2             1.44k ± 0%
SimpleImage_GetImage/FromOciDirectory-2           1.23k ± 0%
SimpleImage_FetchSquashedContents/FromTarball-2    21.0 ± 0%