chore(packaging): bump PKGBUILD pkgver to 1.1.1

Version bump in b93e41e updated Cargo.toml only, so the release
workflow's tag/manifest/PKGBUILD agreement check failed on v1.1.1.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BEWKS8smdPfLMZacgDXjAR

packaging/PKGBUILD

@@ -9,7 +9,7 @@
 # Build + install:   cd packaging && makepkg -fi
 
 pkgname=proton-drive-linux
-pkgver=1.1.0
+pkgver=1.1.1
 pkgrel=1
 pkgdesc="Proton Drive client for Linux: FUSE files-on-demand mount, CLI, GTK4 app + tray"
 arch=('x86_64')