chore(pkg): update repository url

.SRCINFO

@@ -2,7 +2,7 @@ pkgbase = opencode
 	pkgdesc = A powerful AI coding agent. Built for the terminal.
 	pkgver = 0.0.53
 	pkgrel = 1
-	url = https://github.com/tfkhdyt/geminicommit
+	url = https://github.com/opencode-ai/${pkgname}
 	arch = x86_64
 	arch = aarch64
 	license = MIT

PKGBUILD

@@ -5,7 +5,7 @@ pkgver=0.0.53
 pkgrel=1
 pkgdesc='A powerful AI coding agent. Built for the terminal.'
 arch=('x86_64' 'aarch64')
-url='https://github.com/tfkhdyt/geminicommit'
+url='https://github.com/opencode-ai/${pkgname}'
 license=('MIT')
 makedepends=('go')
 source=("https://github.com/opencode-ai/${pkgname}/archive/refs/tags/v${pkgver}.tar.gz")