Bump der dependency to v0.8

Release PR: RustCrypto/formats#2234

Author: tarcieri

.github/workflows/crypto-bigint.yml

@@ -54,7 +54,7 @@ jobs:
     strategy:
       matrix:
         include:
-          # `x86` Linux
+          # `x86` Linux (32-bit)
           - target: i686-unknown-linux-gnu
             rust: 1.85.0 # MSRV
             deps: sudo apt update && sudo apt install gcc-multilib

Cargo.lock

@@ -23,7 +23,7 @@ ctutils = "0.4"
 num-traits = { version = "0.2.19", default-features = false }
 
 # optional dependencies
-der = { version = "0.8.0-rc.10", optional = true, default-features = false }
+der = { version = "0.8", optional = true, default-features = false }
 hybrid-array = { version = "0.4.7", optional = true }
 getrandom = { version = "0.4", optional = true, features = ["sys_rng"] }
 rand_core = { version = "0.10", optional = true, default-features = false }