chore: improve deploy-docs script

.circleci/deploy-docs.sh

@@ -48,15 +48,16 @@ cd dist
 git config user.name "$COMMIT_AUTHOR_NAME"
 git config user.email "$COMMIT_AUTHOR_EMAIL"
 
+git add -A .
+
 # If there are no changes to the compiled dist (e.g. this is a README update) then just bail.
-if git diff --quiet; then
+if git diff --cached --quiet; then
     echo "No changes to the output on this push; exiting."
     exit 0
 fi
 
 # Commit the "changes", i.e. the new version.
 # The delta will show diffs between new and old versions.
-git add -A .
 git commit -m "Deploy to GitHub Pages: ${SHA}"
 
 # Now that we're all set up, we can push.