fix(antergos-live): stop sed clobbering remove_calamares_launcher definition

The sed 's/^remove_calamares_launcher/...' matched BOTH the function
definition ('remove_calamares_launcher() {') and the trailing call,
commenting out the definition. With the definition gone, the orphaned
'local launcher' body ran at top level, so the live-session dinit
service failed to start with:

  line 232: local: can only be used in a function
  line 239: syntax error near unexpected token '{'

No /var/log/antergos-live.log was ever written. Anchor the pattern to
the exact call with '$' so only the invocation is disabled and the
function stays intact.

Reproduced from the artix-live 0.14.1 source: pre-fix bash -n fails with
the identical two errors; post-fix it passes.

Also bump pkgver 2026.06 -> 2026.08, pkgrel 5 -> 6.

packages/antergos-live/PKGBUILD

@@ -7,8 +7,8 @@ pkgname=('antergos-live-base'
         'antergos-live-dinit'
         'antergos-live-openrc'
         'antergos-grub-live')
-pkgver=2026.06
-pkgrel=5
+pkgver=2026.08
+pkgrel=6
 pkgdesc='Antergos live session'
 arch=('any')
 url="https://github.com/Antergos-NeXT/antergos-live"
@@ -25,7 +25,7 @@ build() {
     make -C artix-live
 
     # Don't remove calamares.desktop — we ship a branded one
-    sed -i 's/^remove_calamares_launcher/# remove_calamares_launcher/' artix-live/bin/artix-live
+    sed -i 's/^remove_calamares_launcher$/# remove_calamares_launcher/' artix-live/bin/artix-live
 
     # Uncomment calamares section so desktop-items copies it to localized Desktop
     sed -i '/# if .*calamares/,/# fi/ s/^# //' artix-live/bin/desktop-items