Fix arXiv links for MIPSHash and SignALSH.

Author: kernelmethod

src/hashes/mips_hash.jl

@@ -79,7 +79,7 @@ ERROR: norm 2.0 exceeds maxnorm (1.0)
 ```
 
 # References
-- Anshumali Shrivastava and Ping Li. *Asymmetric LSH (ALSH) for Sublinear Time Maximum Inner Product Search (MIPS)*. Proceedings of the 27th International Conference on Neural Information Processing Systems - Volume 2, NIPS'14, page 2321–2329, Cambridge, MA, USA, 2014. MIT Press. 10.5555/2969033.2969086. [https://arxiv.org/abs/1405.5869]
+- Anshumali Shrivastava and Ping Li. *Asymmetric LSH (ALSH) for Sublinear Time Maximum Inner Product Search (MIPS)*. Proceedings of the 27th International Conference on Neural Information Processing Systems - Volume 2, NIPS'14, page 2321–2329, Cambridge, MA, USA, 2014. MIT Press. 10.5555/2969033.2969086. [https://arxiv.org/abs/1405.5869](https://arxiv.org/abs/1405.5869)
 
 See also: [`inner_prod`](@ref), [`ℓ2_norm`](@ref ℓp_norm)
 """

src/hashes/sign_alsh.jl

@@ -79,7 +79,7 @@ ERROR: norm 2.0 exceeds maxnorm (1.0)
 ```
 
 # References
-- Anshumali Shrivastava and Ping Li. *Improved Asymmetric Locality Sensitive Hashing (ALSH) for Maximum Inner Product Search (MIPS)*. In Proceedings of the Thirty-First Conference on Uncertainty in Artificial Intelligence, UAI'15, page 812–821, Arlington, Virginia, USA, 2015. AUAI Press. 10.5555/3020847.3020931. [https://arxiv.org/abs/1410.5410v2]
+- Anshumali Shrivastava and Ping Li. *Improved Asymmetric Locality Sensitive Hashing (ALSH) for Maximum Inner Product Search (MIPS)*. In Proceedings of the Thirty-First Conference on Uncertainty in Artificial Intelligence, UAI'15, page 812–821, Arlington, Virginia, USA, 2015. AUAI Press. 10.5555/3020847.3020931. [https://arxiv.org/abs/1410.5410v2](https://arxiv.org/abs/1410.5410v2)
 
 See also: [`inner_prod`](@ref inner_prod(::AbstractVector, ::AbstractVector)), [`ℓ2_norm`](@ref ℓp_norm)
 """