fix(deps): update github.com/longhorn/backupstore digest to 6024716 (v1.6.x)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/longhorn/backupstore	require	digest	326b984 -> 6024716

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[renovate]

ℹ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 6 additional dependencies were updated

Details:

Package	Change
golang.org/x/net	v0.28.0 -> v0.29.0
google.golang.org/grpc	v1.65.0 -> v1.66.0
github.com/longhorn/go-common-libs	v0.0.0-20240821134112-907f57efd48f -> v0.0.0-20240906072425-66d5f9e6ae4e
golang.org/x/sys	v0.24.0 -> v0.25.0
golang.org/x/text	v0.17.0 -> v0.18.0
google.golang.org/genproto/googleapis/rpc	v0.0.0-20240528184218-531527333157 -> v0.0.0-20240604185151-ef581f913117