add arbiscan links for arbos40 activations

docs/network-upgrades.md

@@ -18,7 +18,7 @@ Visit [Inside Arbitrum Nitro](https://docs.arbitrum.io/inside-arbitrum-nitro/) t
 
 | Upgrade         | Governance Approval Status | Link to most recent governance stage             | Arbitrum Sepolia (YYYY-MM-DD)    | Arbitrum One (YYYY-MM-DD) | Arbitrum Nova     (YYYY-MM-DD)      |
 |-----------------|----------------------------|--------------------------------------------------|----------------------------------|---------------------------|-------------------------------------|
-| [ArbOS 40 Callisto](https://docs.arbitrum.io/node-running/reference/arbos-software-releases/arbos40) | Approved but pending on-chain execution              | [Snapshot vote](https://snapshot.box/#/s:arbitrumfoundation.eth/proposal/0x7cc26491a070c74c1a4ec5a9892571d31eb690015936a35b52c0d3a97bd5497f)                                                                    | [Mon, 2025-05-06 at 02:54:45 PM UTC](https://sepolia.arbiscan.io/tx/0xce8d716391583d10e6c7b27d17118b9e2845cbb44321b466adff1b9168603a40) | Tues, 2025-06-17 4:00:00 PM UTC | Tues, 2025-06-17 4:00:00 PM UTC |
+| [ArbOS 40 Callisto](https://docs.arbitrum.io/node-running/reference/arbos-software-releases/arbos40) | Approved but pending on-chain execution              | [Snapshot vote](https://snapshot.box/#/s:arbitrumfoundation.eth/proposal/0x7cc26491a070c74c1a4ec5a9892571d31eb690015936a35b52c0d3a97bd5497f)                                                                    | [Mon, 2025-05-06 at 02:54:45 PM UTC](https://sepolia.arbiscan.io/tx/0xce8d716391583d10e6c7b27d17118b9e2845cbb44321b466adff1b9168603a40) | [Tues, 2025-06-17 4:00:00 PM UTC](https://arbiscan.io/tx/0xfcbe6cb3dcb58b1c201b02f7f8649a48083b581c1ecebd356fe961185882a907) | [Tues, 2025-06-17 4:00:00 PM UTC](https://nova.arbiscan.io/tx/0xf3865b447d3aa086c9f784fe9d6001bffb3d46e759b99ea9e596384962c63e9e) |
 | [Arbitrum BoLD](https://docs.arbitrum.io/how-arbitrum-works/bold/gentle-introduction)                | Approved & executed                                  | [On-chain Tally vote](https://www.tally.xyz/gov/arbitrum/proposal/101924107818180443784046677916233531742645798596604549673138282938475874935972?govId=eip155:42161:0xf07DeD9dC292157749B6Fd268E37DF6EA38395B9) | [Weds, 2024-12-11 06:21:36 PM UTC](https://sepolia.etherscan.io/tx/0x84950b761493e33b792986b66201401fce921cc75ad2e1811fea3f2644a27b99) | [Wed, 2025-02-12 02:00:11 PM UTC](https://etherscan.io/tx/0xe9788a104f8443b5900e54f8c887f0522d121487fc343a1ff90e1e6ed987967e) | [Wed, 2025-02-12 02:00:11 PM UTC](https://etherscan.io/tx/0xe9788a104f8443b5900e54f8c887f0522d121487fc343a1ff90e1e6ed987967e) |
 | [ArbOS 32 Bianca](https://docs.arbitrum.io/run-arbitrum-node/arbos-releases/arbos32)                 | Approved & executed by the Arbitrum Security Council | N/A                                                                                                                                                                                                             | [Weds, 2024-09-25 at 02:06:01 UTC](https://sepolia.arbiscan.io/tx/0x180d29cc945cbedbb7076d721560cecbde71cda9b61a1614535f88e712dce692)  | [Weds, 2024-09-25 at 02:37:30 UTC](https://arbiscan.io/tx/0x28f3ae9002bd49f4bbcb6ffa48b2e8f30692f7fdf0b9d84e4c2a4e0b75d732e8) | [Weds, 2024-09-25 at 02:26:11 UTC](https://nova.arbiscan.io/tx/0x77224d12d0154bf971094202a5e24cbc21b7e8f1bef2d716098e9fc9b34202b7) |
 | ArbOS 31 Bianca                                                                                      | Approved & executed                                  | [On-chain Tally vote](https://www.tally.xyz/gov/arbitrum/proposal/108288822474129076868455956066667369439381709547570289793612729242368710728616)                                                               | Mon, 2024-06-17 at 17:00:00 UTC  | Tues, 2024-09-03 at 17:00:00 UTC | Tues, 2024-09-03 at 17:00:00 UTC |