fix: cd /tmp before mkimage.sh to avoid git repo context conflict

iso/builder/build-debug.sh

@@ -89,6 +89,8 @@ mkdir -p "${DIST_DIR}"
 echo ""
 echo "=== building ISO ==="
 
+# mkimage.sh uses git internally; run it from /tmp to avoid conflicts with bee repo
+cd /tmp
 sh /usr/share/aports/scripts/mkimage.sh \
     --tag "v${ALPINE_VERSION}" \
     --outdir "${DIST_DIR}" \