update old BPT oracle links (#326)

Author: tiago-hansen

docs/concepts/core-concepts/bpt-oracles/bpt-oracles.md

@@ -316,9 +316,9 @@ This approach is resistant to price manipulation within the pool because it reli
 
 See the [contracts](./bpt-oracles-contracts.md) page for practical examples of using the oracles.
 
-For a more detailed mathematical description of how this is applied to Stable Pools, see the [Pricing Stable Pool BPTs](https://github.com/balancer/balancer-v3-monorepo/blob/main/pkg/oracles/docs/StableOracle.md) document in the V3 monorepo.
+For a more detailed mathematical description of how this is applied to Stable Pools, see the [Pricing Stable Pool BPTs](https://github.com/balancer/balancer-v3-monorepo/blob/main/pkg/standalone-utils/docs/StableOracle.md) document in the V3 monorepo.
 
-True math nerds can review the [Pricing StableSwap pools](https://github.com/balancer/balancer-v3-monorepo/blob/main/pkg/oracles/docs/pricing_stableSwap_pools.pdf) paper by Sergio A. Yuhjtman, our resident mathematician.
+True math nerds can review the [Pricing StableSwap pools](https://github.com/balancer/balancer-v3-monorepo/blob/main/pkg/standalone-utils/docs/pricing_stableSwap_pools.pdf) paper by Sergio A. Yuhjtman, our resident mathematician.
 
 This paper goes much deeper into the mathematics, providing a rigorous theoretical backing for the computation methods described in the docs.