docs: resolve T6 review comments — set T6 release to v1.9.0 and rename operator section heading

Author: malleshpai

src/pages/guide/node/network-upgrades.mdx

@@ -44,7 +44,7 @@ For detailed release notes and binaries, see the [Changelog](/changelog).
 | **Scope** | Account-level receive policies for safer TIP-20 deposits; admin access keys for smoother passkey, device, and delegated-key management |
 | **TIPs** | [TIP-1028: Account-Level Receive Policies](https://tips.sh/1028), [TIP-1049: Admin Access Keys](https://tips.sh/1049) |
 | **Details** | [T6 network upgrade](/protocol/upgrades/t6) |
-| **Release** | TBD |
+| **Release** | v1.9.0 |
 | **Testnet** | June 18, 2026 4pm CEST (unix: 1781791200) |
 | **Mainnet** | June 23, 2026 4pm CEST (unix: 1782223200) |
 | **Priority** | <Badge variant="red">Required</Badge> |

src/pages/protocol/upgrades/t6.mdx

@@ -78,7 +78,7 @@ Read the technical specification at [TIP-1049](https://tips.sh/1049).
 
 T6-compatible SDK releases will be listed here as they ship.
 
-## What operators and integrators should show
+## What operators and integrators should know
 
 T6 is mostly additive. Integrators, indexers, wallets, and partner infrastructure should review the notes below before activation.