Chore: fix shellchecks (#83421)

scripts/check-breaking-changes.sh

@@ -17,7 +17,15 @@ while IFS=" " read -r -a package; do
   CURRENT="./pr/$PACKAGE_PATH"
 
   # Temporarily skipping these packages as they don't have any exposed static typing
-  if [[ ${SKIP_PACKAGES[@]} =~ "$PACKAGE_PATH" ]]; then
+  SKIP_PACKAGE_FOUND=0
+  for skip_pkg in "${SKIP_PACKAGES[@]}"; do
+    if [[ "$PACKAGE_PATH" == "$skip_pkg" ]]; then
+      SKIP_PACKAGE_FOUND=1
+      break
+    fi
+  done
+
+  if [[ $SKIP_PACKAGE_FOUND -eq 1 ]]; then
     continue
   fi