chore: Use rust 1.88

Author: frap129

builder/build-hyperfox.sh

@@ -5,7 +5,7 @@ export MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE=pip
 export MOZBUILD_STATE_PATH="$srcdir/mozbuild"
 export MOZ_BUILD_DATE="$(date -u${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH} +%Y%m%d%H%M%S)"
 export MOZ_NOSPAM=1
-export MOZ_RUST_VERSION="1.86.0"
+export MOZ_RUST_VERSION="1.88.0"
 export SCCACHE_DIR="/src/sccache"
 export SCCACHE_DIRECT=true