Add LibGroupInSpecT to ignored for packager

diff --git a/.pkgmeta b/.pkgmeta
index 0bd9658..3701bf2 100644
--- a/.pkgmeta
+++ b/.pkgmeta
@@ -9,6 +9,7 @@ ignore:
   - vendor/CallbackHandler-1.0
   - vendor/Ace3
   - vendor/LibItemUpgradeInfo-1.0
+  - vendor/LibGroupInSpecT-1.1

 externals:
     vendor/LibStub: