Temporarily disable aarch64-unknown-linux-gnu target in github work…

…flow cicd (#8)

Because somehow rust runs 100x slower on this target (simulated using rust `cross` from x86_64 github runner), and causes timeout assertions in tokenization to constantly fail. See more at issue #8 (#8).

.github/workflows/cicd.yml

@@ -73,9 +73,12 @@ jobs:
       fail-fast: false
       matrix:
         job:
-          - target: aarch64-unknown-linux-gnu
-            os: ubuntu-22.04
-            use-cross: true
+          # This should be re-enabled after issue #8 is resolved. See more at
+          # https://github.com/kkew3/jieba.vim/issues/8.
+          #
+          # - target: aarch64-unknown-linux-gnu
+          #   os: ubuntu-22.04
+          #   use-cross: true
           - target: x86_64-unknown-linux-gnu
             os: ubuntu-22.04
             use-cross: true