Bump version to 1.2.0 in changelog and spec

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Merge pull request #52 from linyows/feature/shared-cache-with-hmac-si…

…gnature

Add HMAC-SHA256 signed shared cache

fix badge

Merge pull request #49 from linyows/bugfix

Bugfix

use upload-release-action

Merge pull request #42 from linyows/bugfix

Fix null pointer for libc_free

bump version to 0.7.0

update README

Merge pull request #31 from linyows/bug

Fix SEGV for systemd-networkd starting

Merge pull request #29 from linyows/support-slug

Support slug for github team API