docs(configuration): replace OP Mainnet admin addresses with Base's

[kriss39]

What changed? Why?

The Admin Roles / Service Roles tables on specifications/reference/configuration list OP Mainnet's addresses, not Base's. The four linked addresses were:

Row	Was	Is actually
L1 ProxyAdmin Owner	0x5a0Aae59…3d2A	0x7bB41C30…595c
L2 ProxyAdmin Owner	0x6B1BAE59…4E3b (linked to optimistic.etherscan.io)	0x8cC51c30…6a6d
Challenger	0x9BA6e03D…6b3A	0x819501cd…d102
Guardian	0x09f7150D…dAf2	0x7bB41C30…595c

0x5a0Aae59… is OP Mainnet's ProxyAdmin.owner() and 0x09f7150D… is OP Mainnet's OptimismPortal.guardian(), so this looks like a leftover from copying the OP "standard configuration" page. The new values match the Contract Addresses page.

Notes to reviewers

Verified against L1 mainnet:

• ProxyAdmin(0x0475cBCA…059E).owner() → 0x7bb41c3008b3f03fe483b28b8db90e19cf07595c
• OptimismPortal(0x49048044…E97e).guardian() → 0x7bb41c3008b3f03fe483b28b8db90e19cf07595c
• Base L2 ProxyAdmin(0x4200…0018).owner() → 0x8cc51c3008b3f03fe483b28b8db90e19cf076a6d, which is 0x7bB41C30…595c + 0x1111…1111 (aliased L1 owner, as the row says)
• Challenger taken from the existing Base Contracts page; the previous value is OP's.

How has it been tested?

node scripts/lint-mdx.js docs/specifications/reference/configuration.mdx and node scripts/validate-docs-structure.js pass.

Screenshots

N/A (four table cells change, no layout change)

[cb-heimdall]

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