Prepare for Pectra fork

[PabloCastellano]

Pectra upgrade is expected to happen in March 2025 and will increase the number of blobs to 6.

Make sure Blobscan is ready for this change. We might need to update some constants and logic in apps/web/src/utils/ethereum.ts:

blobscan/apps/web/src/utils/ethereum.ts

Lines 3 to 8 in 31be3e0

	export const GAS_PER_BLOB = 131_072; // 2 ** 17
	export const BLOB_SIZE = GAS_PER_BLOB;
	export const TARGET_BLOB_GAS_PER_BLOCK = 393_216;
	export const TARGET_BLOBS_PER_BLOCK = TARGET_BLOB_GAS_PER_BLOCK / GAS_PER_BLOB;
	export const BLOB_GAS_LIMIT_PER_BLOCK = 786_432;
	export const MAX_BLOBS_PER_BLOCK = BLOB_GAS_LIMIT_PER_BLOCK / GAS_PER_BLOB;