fix(release): invoke update_apt_repo.sh via bash — Permission denied fix (closes #98)

[levleontiev]

Fixes #98

Problem

The update-apt-repo job was failing with:

./edge-repo/bin/ci/update_apt_repo.sh: Permission denied

exit code 126 — the script lacks the executable bit in git, so the runner cannot execute it directly.

Fix

Prefix the call with bash so the script runs regardless of the file mode:

bash ./edge-repo/bin/ci/update_apt_repo.sh "$DEB_FILE" "./apt-repo" "$FINGERPRINT"

Also adds ## [v0.2.6] changelog entry.