deps: update dependency hashicorp/packer to v1.16.1

[renovate]

This PR contains the following updates:

Package	Update	Change
hashicorp/packer	patch	1.16.0 → 1.16.1

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Release Notes

hashicorp/packer (hashicorp/packer)

v1.16.1

Compare Source

FEATURES:

• plugin/getter: add support for installing plugins from non-GitHub HTTPS sources,
  including mirrors and artifact repositories that expose the HashiCorp release
  directory format.
  GH-13691

IMPROVEMENTS:

• communicator/winrm: add configurable connection timeout and retry interval settings.
  GH-13701
• build: update Go to 1.26.8.
  GH-13701

BUG FIXES:

• core/hcl2: pass user variable values to builders, provisioners, and post-processors
  as packer_user_variables, restoring legacy {{ user "name" }} interpolation in
  plugin-managed templates.
  GH-13686
• post-processor/shell-local: execute inline scripts through the shell to avoid
  intermittent ETXTBSY errors.
  GH-13701
• build: bump github.com/shoenig/go-m1cpu to v0.2.2 to prevent segmentation
  faults on Apple M5 hardware.
  GH-13696

SECURITY:

• deps: bump google.golang.org/grpc to v1.83.2 in Packer and the plugin
  tester to reject requests missing both the :authority and Host headers.
  GH-13704
  GH-13707

DEPENDENCIES:

• deps: bump github.com/hashicorp/packer-plugin-sdk to v0.6.11.
  GH-13701
• deps: bump github.com/hashicorp/go-getter/v2 to v2.2.4.
  GH-13701
• deps: bump github.com/hashicorp/hcp-sdk-go to v0.175.0,
  github.com/go-git/go-git/v5 to v5.19.2, and
  github.com/klauspost/compress to v1.18.7.
  GH-13689
• deps: bump golang.org/x/crypto to v0.56.0, golang.org/x/net to
  v0.58.0, and google.golang.org/grpc to v1.83.2.
  GH-13701
  GH-13707
• deps: bump go.opentelemetry.io/otel, go.opentelemetry.io/otel/metric,
  and go.opentelemetry.io/otel/trace to v1.45.0, and
  github.com/go-logr/logr to v1.4.4.
  GH-13710
• deps: update additional Go module dependencies in Packer and the plugin tester.
  GH-13689
  GH-13701

INTERNAL:

• docs: update the README contribution link to use the main branch.
  GH-13700
• compliance: update copyright headers.
  GH-13699

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