audit: Add latest stake pool audit from Halborn (#6174)

Author: joncinque

README.md

@@ -43,7 +43,7 @@ Only a subset of programs within the Solana Program Library repo are audited. Cu
 | [token](https://github.com/solana-labs/solana-program-library/tree/master/token/program) | 2022-08-04 (Peer review) | [4fadd55](https://github.com/solana-labs/solana-program-library/commit/4fadd553e1c549afd1d62aeb5ffa7ef31d1999d1) |
 | [associated-token-account](https://github.com/solana-labs/solana-program-library/tree/master/associated-token-account/program) | 2022-08-04 (Peer review) | [c00194d](https://github.com/solana-labs/solana-program-library/commit/c00194d2257302f028f44a403c6dee95c0f9c3bc) |
 | [token-2022](https://github.com/solana-labs/solana-program-library/tree/master/token/program-2022) | [2023-11-03](https://github.com/solana-labs/security-audits/blob/master/spl/OtterSecToken2022Audit-2023-11-03.pdf) | [e924132](https://github.com/solana-labs/solana-program-library/tree/e924132d65ba0896249fb4983f6f97caff15721a) |
-| [stake-pool](https://github.com/solana-labs/solana-program-library/tree/master/stake-pool/program) | [2023-11-14](https://github.com/solana-labs/security-audits/blob/master/spl/NeodymeStakePoolAudit-2023-11-14.pdf) | [6ed7254](https://github.com/solana-labs/solana-program-library/commit/6ed7254d1a578ffbc2b091d28cb92b25e7cc511d) |
+| [stake-pool](https://github.com/solana-labs/solana-program-library/tree/master/stake-pool/program) | [2023-12-31](https://github.com/solana-labs/security-audits/blob/master/spl/HalbornStakePoolAudit-2023-12-31.pdf) | [a17fffe](https://github.com/solana-labs/solana-program-library/commit/a17fffe70d6cc13742abfbc4a4a375b087580bc1) |
 | [account-compression](https://github.com/solana-labs/solana-program-library/tree/master/account-compression/programs/account-compression) | [2022-12-05](https://github.com/solana-labs/security-audits/blob/master/spl/OtterSecAccountCompressionAudit-2022-12-03.pdf) | [6e81794](https://github.com/solana-labs/solana-program-library/commit/6e81794) |
 | [shared-memory](https://github.com/solana-labs/solana-program-library/tree/master/shared-memory/program) | [2021-02-25](https://github.com/solana-labs/security-audits/blob/master/spl/KudelskiTokenSwapSharedMemAudit-2021-02-25.pdf) | [b40e0dd](https://github.com/solana-labs/solana-program-library/commit/b40e0dd3fd6c0e509dc1e8dd3da0a6d609035bbd) |
 | [single-pool](https://github.com/solana-labs/solana-program-library/tree/master/single-pool/program) | [2024-01-02](https://github.com/solana-labs/security-audits/blob/master/spl/ZellicSinglePoolAudit-2024-01-02.pdf) | [ef44df9](https://github.com/solana-labs/solana-program-library/commit/ef44df985e76a697ee9a8aabb3a223610e4cf1dc) |

docs/src/stake-pool.md

@@ -59,3 +59,6 @@ chronological order, and the commit hash that each was reviewed at:
 * Neodyme Fourth Audit
     - Review commit hash [`6ed7254`](https://github.com/solana-labs/solana-program-library/tree/6ed7254d1a578ffbc2b091d28cb92b25e7cc511d)
     - Report https://github.com/solana-labs/security-audits/blob/master/spl/NeodymeStakePoolAudit-2023-11-14.pdf
+* Halborn Second Audit
+    - Review commit hash [`a17fffe`](https://github.com/solana-labs/solana-program-library/tree/a17fffe70d6cc13742abfbc4a4a375b087580bc1)
+    - Report https://github.com/solana-labs/security-audits/blob/master/spl/HalbornStakePoolAudit-2023-12-31.pdf