docs(gpu): name the moved test module in a comment

crates/gpu/src/fx_depth.rs

@@ -280,7 +280,7 @@ fn cryptomatte(e: &mut Enc, ctx: &EffectCtx, b: GBuf, a: &AuxChannels) -> Option
     // cores with the rank planes resolved once.
     // The ID colours are only read by the Colors display; Matte, Preview and Matte Only need the
     // matte alone.
-    // `tests_fx_depth::cryptomatte_every_display_matches_the_cpu` guards this against the shader.
+    // `tests::fx_depth::cryptomatte_every_display_matches_the_cpu` guards this against the shader.
     let what = effectcraft_effects::CryptoAux::for_display(pr.e("display"), pr.b("matteOnly"));
     let img = effectcraft_effects::crypto_aux_image_with(a, &layer, &sel, what);
     let tex = e.g.upload_image(&img)?;