chore(deps): update docker.io/syncthing/syncthing docker tag to v1.27.3

This MR contains the following updates:

Package	Update	Change	OpenSSF
docker.io/syncthing/syncthing (source)	patch	1.27.2 -> 1.27.3

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Release Notes

syncthing/syncthing (docker.io/syncthing/syncthing)

v1.27.3

Compare Source

Bugfixes:

• #​9039: Sync from Linux to Mac with ownership - Local additions after rescan
• #​9241: Versions path does not honor tilde (~) shortcut

Enhancements:

• #​8616: Add CLI completion
• #​9151: Add "stay logged in" checkbox to login dialog

Other issues:

• #​9267: Inconsistent version requirements in lib/build and lib/upgrade
• #​9313: Different lengths used for short device IDs in UI

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