Merge pull request #2599 from input-output-hk/jc/add-babbage-to-readme

add Babbage information to the Readme

README.md

@@ -18,6 +18,7 @@ Byron | | [Chain Spec](https://hydra.iohk.io/job/Cardano/cardano-ledger-specs/by
 Shelley | [Design](https://hydra.iohk.io/job/Cardano/cardano-ledger-specs/delegationDesignSpec/latest/download-by-type/doc-pdf/delegation_design_spec "Design Specification for Delegation and Incentives in Cardano") | [Spec](https://hydra.iohk.io/job/Cardano/cardano-ledger-specs/shelleyLedgerSpec/latest/download-by-type/doc-pdf/ledger-spec "A Formal Specification of the Cardano Ledger") | [CDDL](https://github.com/input-output-hk/cardano-ledger-specs/tree/master/eras/shelley/test-suite/cddl-files)
 Allegra & Mary | [Multi-Currency](https://eprint.iacr.org/2020/895 "Multi-Currency Ledgers"), [UTXOma](https://iohk.io/en/research/library/papers/utxoma-utxo-with-multi-asset-support/ "UTXOma:UTXO with Multi-Asset Support") | [Spec](https://hydra.iohk.io/job/Cardano/cardano-ledger-specs/specs.shelley-ma/latest/download-by-type/doc-pdf/shelley-ma "A Formal Specification of the Cardano Ledger with a Native Multi-Asset Implementation") | [CDDL](https://github.com/input-output-hk/cardano-ledger-specs/tree/master/eras/shelley-ma/test-suite/cddl-files)
 Alonzo | [eUTXO](https://iohk.io/en/research/library/papers/the-extended-utxo-model/ "The Extended UTXO Model")| [Spec](https://hydra.iohk.io/job/Cardano/cardano-ledger-specs/specs.alonzo-ledger/latest/download-by-type/doc-pdf/alonzo-changes "A Formal Specification of the Cardano Ledger integrating Plutus Core") | [CDDL](https://github.com/input-output-hk/cardano-ledger-specs/tree/master/eras/alonzo/test-suite/cddl-files)
+Babbage | [batch-verification](https://iohk.io/en/research/library/papers/on-uc-secure-range-extension-and-batch-verification-for-ecvrf/ "On UC-Secure Range Extension and Batch Verification for ECVRF"), [CIP-31](https://github.com/cardano-foundation/CIPs/pull/159 "Reference inputs"), [CIP-32](https://github.com/cardano-foundation/CIPs/pull/160 "Inline datums"), [CIP-33](https://github.com/cardano-foundation/CIPs/pull/161 "Reference scripts") | [Spec-WIP](https://hydra.iohk.io/job/Cardano/cardano-ledger-specs/specs.babbage-ledger/latest/download-by-type/doc-pdf/babbage-changes "Babbage WIP") |
 
 Other Documents:
 - [Non-integer calculations specification](https://hydra.iohk.io/job/Cardano/cardano-ledger-specs/nonIntegerCalculations/latest/download-by-type/doc-pdf/non-integer-calculations): details on the parts of the Shelley specification that use real numbers.