grype version of sub action to download grype pinned to 0.63.1

[uli-f]

I use the download grype subaction to download grype and then run it locally (i.e., on the github runner):

- name: 💾 Install grype
  uses: anchore/scan-action/download-grype@v3
  id: grype_install

- name: 🕵️ Scan artifact with grype
  run: grype sbom:./build/reports/sbom.json --add-cpes-if-none --config ./grype.yaml --fail-on medium --only-fixed --output template --template grype.sbom.input.template > ./grype-output.txt

The downloaded grype version defaults to the pinned version in GrypeVersion.js. However, this points to a pretty old grype version, that is, 0.63.1.

My understanding is that I can specify the grype version myself in the download subaction. But then I also have to update it manually.

I'd very much appreciate a feature where the download subaction always downloads the latest grype release instead of either me (by specifying grype-version) or you guys (by specifying a grype version in GrypeVersion.js) manually taking care of this.