docs/install/gcp.md: removed the duplicate '# OpenClaw on GCP Compute
Engine (Docker, Production VPS Guide)' H1 plus its redundant '## Goal'
header. Mintlify renders the title from frontmatter, so the body H1
created a brittle anchor and the prose now starts directly with the
goal sentence.
docs/install/node.md: replaced 8 typography characters (curly quotes
and non-breaking hyphens) with ASCII equivalents.
docs/tools/duckduckgo-search.md: replaced 9 typography characters with
ASCII equivalents.
docs/tools/browser-login.md: removed the duplicate '# Browser login +
X/Twitter posting' H1 (Mintlify renders title from frontmatter; the
'+' would also have produced a brittle anchor). Replaced 2 typography
characters with ASCII equivalents.
e36cb33379
