[Backport v3.7-branch] doc: _templates: show correct version in sidebar in case of releases#91875

dkalowsk merged 1 commit intov3.7-branchzephyrproject-rtos/zephyr:v3.7-branchfrom

backport-91817-to-v3.7-branchzephyrproject-rtos/zephyr:backport-91817-to-v3.7-branchCopy head branch name to clipboard