fix: update upcoming releases (#97)

Author: danyalprout

docs/base-chain/network-information/block-building.mdx

@@ -11,10 +11,10 @@ would change but the user experience would remain consistent.
 
 The Base networks are currently configured in the following ways:
 
-| Network      | Current Configuration       | Upcoming Deployments                      |
-|--------------|-----------------------------|-------------------------------------------|
-| Base Mainnet | [Flashblocks](#flashblocks) | [Flashblocks](#flashblocks) (Summer 2025) |
-| Base Sepolia | [Flashblocks](#flashblocks) | None                                      |
+| Network      | Current Configuration       | Upcoming Deployments   |
+|--------------|-----------------------------|------------------------|
+| Base Mainnet | [Flashblocks](#flashblocks) | None                   |
+| Base Sepolia | [Flashblocks](#flashblocks) | None                   |
 
 ## Configurations
 
@@ -52,4 +52,4 @@ priority fee, see the ([code](https://github.com/ethereum-optimism/op-geth/blob/
 
 import PolicyBanner from "/snippets/PolicyBanner.mdx";
 
-<PolicyBanner />
+<PolicyBanner />