chore: fix docs builds (#15533)

(cherry picked from commit fdd8fed)

Author: mabdinur

docs/spelling_wordlist.txt

@@ -346,3 +346,5 @@ xfail
 yaaredis
 openai-agents
 validators
+jitter
+durations

scripts/docs/build.sh

@@ -2,18 +2,13 @@
 set -eux
 
 if [[ "${READTHEDOCS:-}" = "True" ]]; then
-    # We skip here because we do not check spelling in RTD
-    echo "Skipping install"
+  echo "Skipping spelling check in RTD"
 else
   if [[ "$(uname)" == "Darwin" ]]; then
     brew install enchant
+    export PYENCHANT_LIBRARY_PATH=$(brew --prefix enchant)/lib/libenchant-2.dylib
   fi
+  sphinx-build -vvv -W -b spelling docs docs/_build/spelling
 fi
-
-if [[ "$(uname)" == "Darwin" ]]; then
-  export PYENCHANT_LIBRARY_PATH=/opt/homebrew/lib/libenchant-2.dylib
-fi
-
 reno lint
-sphinx-build -vvv -W -b spelling docs docs/_build/html
 sphinx-build -vvv -W -b html docs docs/_build/html