T3 Code: accept the AppImage's compatibility libraries under their new names

The 2026-10-07 nightly ships the same six compatibility libraries with
their full versioned file names beside the short ones (libXss.so.1.0.0),
and two under their GTK 3 names (libappindicator3, libindicator3). The
guard in package() listed the short names only, so it stopped the build
on both architectures and with it the bundled upstream sync (#837).

Accept an optional 3 and trailing version numbers. Anything else in
usr/ still stops the build. t3code-bin carries the same guard and gets
the same pattern before the change reaches a stable release.

pkgbuilds/t3code-nightly-bin/PKGBUILD

@@ -86,10 +86,12 @@ package() {
   # The AppImage's usr/ tree is compatibility libraries for distributions that
   # lack them, and Arch is not one; its icons are the only part worth keeping.
   # A release that starts shipping something else there stops the build rather
-  # than having it deleted quietly on the way past.
+  # than having it deleted quietly on the way past. The same six libraries
+  # under their full versioned names (libXss.so.1.0.0) or their GTK 3 names
+  # (libappindicator3, libindicator3) are not something else.
   local unexpected
   unexpected=$(find usr \( -type f -o -type l \) | grep -vE \
-    '^usr/share/icons/hicolor/[0-9]+x[0-9]+/apps/t3code\.png$|^usr/lib/lib(Xss\.so\.1|Xtst\.so\.6|appindicator\.so\.1|gconf-2\.so\.4|indicator\.so\.7|notify\.so\.4)$' || true)
+    '^usr/share/icons/hicolor/[0-9]+x[0-9]+/apps/t3code\.png$|^usr/lib/lib(Xss\.so\.1|Xtst\.so\.6|appindicator3?\.so\.1|gconf-2\.so\.4|indicator3?\.so\.7|notify\.so\.4)(\.[0-9]+)*$' || true)
   if [[ -n "${unexpected}" ]]; then
     echo "Unexpected files in the AppImage's usr/ tree:" >&2
     echo "${unexpected}" >&2