Do not run buildkite tests if gitbook config modified (#10692)

Co-authored-by: publish-docs.sh <maintainers@solana.com>

ci/buildkite-pipeline.sh

@@ -207,7 +207,7 @@ pull_or_push_steps() {
 
   # Run the full test suite by default, skipping only if modifications are local
   # to some particular areas of the tree
-  if affects_other_than ^.buildkite ^.travis .md$ ^docs/ ^web3.js/ ^explorer/; then
+  if affects_other_than ^.buildkite ^.travis .md$ ^docs/ ^web3.js/ ^explorer/ ^.gitbook; then
     all_test_steps
   fi