Bump cardano-api to 11.6.0.0

[carbolymer]

Context

Bump the cardano-api dependency to 11.6.0.0.

See the cardano-api 11.6.0.0 release notes for details.

How to trust this PR

CI building against cardano-api 11.6.0.0 across the GHC matrix, plus the existing test suites, cover this change.

Changes

• Bump cardano-api dependency from ^>=11.5 to ^>=11.6 in cardano-cli.cabal
• Bump the CHaP index-state in cabal.project to 2026-08-25T14:04:50Z
• Bump the CHaP flake input in flake.lock accordingly
• Add a ShelleyBasedEraDijkstra arm to mkTxOut in cardano-cli/src/Cardano/CLI/Compatible/Transaction/TxOut.hs, mirroring the existing Conway arm: cardano-api 11.6.0.0 completes the Dijkstra era wiring, which turned this era match into a non-exhaustive pattern under -Werror

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. See Running tests for more details
• Self-reviewed the diff
• Changelog fragment added in .changes/

[Copilot]

Pull request overview

This PR updates the cardano-cli dependency set to use cardano-api 11.6, aligning the Cabal solver’s cardano-haskell-packages index-state and the Nix flake input pin (CHaP) to newer snapshots.

Changes:

• Bump cardano-api dependency bound from ^>=11.5 to ^>=11.6 in cardano-cli.cabal.
• Update cabal.project CHaP index-state to a newer timestamp.
• Update flake.lock to pin CHaP to a newer commit/hash.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
flake.lock	Advances CHaP input pin to match the newer dependency snapshot.
cardano-cli/cardano-cli.cabal	Raises the cardano-api version bound to ^>=11.6.
cabal.project	Moves CHaP index-state forward to resolve/build against the updated snapshot.

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[palas]

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