#9170 docs(library): update best-zapier-alternatives

Summary

• Refreshes the library post best-zapier-alternatives (apps/sim/content/library/best-zapier-alternatives/index.mdx).
• Title unchanged.
• A replacement article was merged into the existing post.
• Requested change: MERGE this refresh into library/best-zapier-alternatives; do not swap or overwrite the existing post wholesale. Keep every existing FAQ question verbatim unless factually wrong, every existing H2/H3, every product already compared, every outbound citation, every number or price, and every internal l…

Generated by the Library Post PR Updater workflow. Not built or tested locally. After the PR opens, the workflow content gate checks changed paths, frontmatter keys, FAQ placement, and internal links; CI check:library-content validates the post once it is enabled.

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