[canvaskit] Bump GPU resource cache to 256MB

Wrong file was previously edited.

Change-Id: I2e78d102ca85a22268481d1958b983e41d72ee3e
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/206271
Reviewed-by: Florin Malita <fmalita@chromium.org>
2 files changed