Update simp/github-action-build-and-sign-pkg-single-rpm action to v2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
simp/github-action-build-and-sign-pkg-single-rpm	action	major	v1 → 2.4.1

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Release Notes

simp/github-action-build-and-sign-pkg-single-rpm (simp/github-action-build-and-sign-pkg-single-rpm)

v2.4.1

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Changed

• Updated bash and project GHA from ::set-output to environment files
• Updated project GHA actions to use checkout@v3 and ubuntu-latest

v2.4.0

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Added

• New env var $CONTAINER_EXE sets container to either docker or podman
  (default: docker)

Changed

• Only process/copy the top-level dist/*.rpm files (only those files are
  signed; this change prevents race between signed & unsigned in repos like
  pkg-r10k)

Fixed

• Summary of built RPMs is now legible

v2.3.0

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Added

• RPMs are now built with verbose logging when input verbose is yes

v2.2.0

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Added

• RPMs are now built and signed from separate containers
• RPMs can now be built from the EL7 RPM build container

v2.1.0

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Fixed

• Update simp-rake-helpers to the latest version (with conservative dep
  updates) before building.

v2.0.0

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Added

• Support and tests for:
  • Non-module asset RPMs (e.g., repos with their own Rakefile and RPM .spec)
  • Multiple RPM files
  • .src.rpm files
  • Public GPG keys for RPM signatures
• New output variables:
  • rpm_file_paths
  • rpm_gpg_files
  • rpm_dist_dir
• Updated README example to reflect @v1 @v2 release

Removed

• Output variables:
  • rpm_file_path
  • rpm_file_basename

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