Updating the portal HW requirements

	modified:   docs/subsquid-network/participate/portal.mdx

Author: abernatskiy

docs/subsquid-network/participate/portal.mdx

@@ -27,7 +27,7 @@ In either scenario you will need
 * Some Arbitrum ETH (for gas)
 
 Portal hardware requirements:
- * at least 25Gb of unused RAM (we're working to reduce this)
+ * at least 4Gb of unused RAM
 
 The rest of the hardware requirements depend on how the portal will be used. A private portal with a single user can run on a laptop, provided that it has enough RAM.