Free depthCopy shader

Author: MCRcortex

src/main/java/me/cortex/voxy/client/core/AbstractRenderPipeline.java

@@ -208,6 +208,7 @@ protected void free0() {
         this.sectionRenderer.free();
         this.depthMaskBlit.delete();
         this.depthSetBlit.delete();
+        this.depthCopy.delete();
         super.free0();
     }