Bug 1786272 - Qt sample project updates

[rosahbruno]

Pull Request checklist

• Quality: Make sure this PR builds and runs cleanly.
  • Inside the glean/ folder, run:
    • npm run test Runs all tests
    • npm run lint Runs all linters
• Tests: This PR includes thorough tests or an explanation of why it does not
• Changelog: This PR includes a changelog entry to CHANGELOG.md or an explanation of why it does not need one
• Documentation: This PR includes documentation changes, an explanation of why it does not need that or a follow-up bug has been filed to do that work
  • Documentation should be added to The Glean Book when making changes to Glean's user facing API
    • When changes to the Glean Book are necessary, link to the corresponding PR on the mozilla/glean repository
  • Documentation should be added to the Glean.js developer documentation when making internal code changes

Additional context

I was able to test this locally by using this portion of the prepare-release script and running it from the /samples/qt directory.

set -eo pipefail

DOIT=y
SED="sed"
WORKSPACE_ROOT="."
NEW_VERSION=1.1.0 # change this to whatever version you want to test

run() {
  [ "${VERB:-0}" != 0 ] && echo "+ $*"
  if [ "$DOIT" = y ]; then
      "$@"
  else
      true
  fi
}

# This gets the version string without the patch version.
GLEAN_VERSION_FOR_QML=$(node -p -e "'${NEW_VERSION}'.split('.').reverse().slice(1).reverse().join('.')")
FILE=README.md
run $SED -i.bak -E \
    -e "s/--option platform=qt --option version=\"[0-9a-z.-]+\"/--option platform=qt --option version=\"${GLEAN_VERSION_FOR_QML}\"/" \
    "${WORKSPACE_ROOT}/${FILE}"
run rm "${WORKSPACE_ROOT}/${FILE}.bak"

[badboy]

minimal nit, but otherwise good to go.