fix: Remove conflicting gcc-multilib packages from CI workflow

- Removed gcc-multilib and g++-multilib which conflict with gcc-14-* cross-compilers
- Keeps crossbuild-essential-amd64, gcc-aarch64-linux-gnu, and gcc-arm-linux-gnueabihf
- Resolves package dependency conflicts that were causing CI failures

Fixes CI workflow package installation errors.

.forgejo/workflows/ci.yml

@@ -65,8 +65,7 @@ jobs:
             python3-setuptools python3-wheel python3-pip \
             crossbuild-essential-amd64 crossbuild-essential-arm64 \
             gcc-aarch64-linux-gnu g++-aarch64-linux-gnu \
-            gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf \
-            gcc-multilib g++-multilib
+            gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf
 
       - name: Checkout code
         run: |