Update shards 0.19.0 (#15290)

Author: straight-shoota

.github/workflows/win_build_portable.yml

@@ -127,7 +127,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: crystal-lang/shards
-          ref: v0.18.0
+          ref: v0.19.0
           path: shards
 
       - name: Build shards release