ci: also update .SRCINFO in pkgver workflow

paru reads .SRCINFO (not PKGBUILD) for version comparison during
sysupgrade. Without updating .SRCINFO, paru never detects upgrades
for PKGBUILD repository packages.

.gitea/workflows/update-pkgver.yaml

@@ -33,10 +33,11 @@ jobs:
           fi
 
           sed -i "s/^pkgver=.*/pkgver=$PKGVER/" moongreet-git/PKGBUILD
+          sed -i "s/^\tpkgver = .*/\tpkgver = $PKGVER/" moongreet-git/.SRCINFO
           echo "Updated pkgver: $OLD_VER → $PKGVER"
 
           git config user.name "pkgver-bot"
           git config user.email "gitea@moonarch.de"
-          git add moongreet-git/PKGBUILD
+          git add moongreet-git/PKGBUILD moongreet-git/.SRCINFO
           git commit -m "chore(moongreet-git): bump pkgver to $PKGVER"
           git -c http.extraHeader="Authorization: token ${{ secrets.PKGBUILD_TOKEN }}" push