ci: Pin nightly toolchain for aarch64_be test

rust-lang/rust#132714 bumped memchr without
considering aarch64_be is not supported in memchr:
BurntSushi/memchr#162

Author: taiki-e

.github/workflows/ci.yml

@@ -162,7 +162,7 @@ jobs:
           - rust: nightly
             target: aarch64-unknown-linux-gnu
             flags: -Z codegen-backend=cranelift
-          - rust: nightly
+          - rust: nightly-2024-11-07 # TODO: https://github.com/BurntSushi/memchr/pull/162
             target: aarch64_be-unknown-linux-gnu
           - rust: stable
             target: aarch64-unknown-linux-musl

tools/build.sh

@@ -74,13 +74,15 @@ default_targets=(
     # FEAT_LSE & FEAT_LSE2
     aarch64-apple-darwin
     # big endian
-    aarch64_be-unknown-linux-gnu
-    aarch64_be-unknown-netbsd
+    # TODO: https://github.com/BurntSushi/memchr/pull/162
+    # aarch64_be-unknown-linux-gnu
+    # aarch64_be-unknown-netbsd
     # ILP32 ABI
     aarch64-unknown-linux-gnu_ilp32
     arm64_32-apple-watchos
     # ILP32 ABI big endian
-    aarch64_be-unknown-linux-gnu_ilp32
+    # TODO: https://github.com/BurntSushi/memchr/pull/162
+    # aarch64_be-unknown-linux-gnu_ilp32
 
     # arm64ec
     # rustc --print target-list | grep -E '^arm64ec'