fixup! Add painfully slow to create hash at max capacity

spec/std/hash_spec.cr

@@ -1393,7 +1393,7 @@ describe "Hash" do
     hash.@indices_size_pow2.should eq(12)
   end
 
-  it "creates with max capacity", slow: true do
+  it "creates with max capacity", tags: %w[slow] do
     Hash(Int32, Int32).new(initial_capacity: Int32::MAX)
   end