[fix](doc) zh random.md upper-bound text and bitwise OR cell rendering

[boluor]

Summary

Two unrelated but small fixes:

1. `numeric-functions/random.md` (zh) — `` parameter description read "随机数的上限 必须小于下限" (upper bound must be less than lower bound), which is backwards. Corrected to "必须大于下限" across zh current / 2.1 / 3.x / 4.x.
2. `basic-element/operators/bitwise-operators.md` (EN + zh) — the OR-row example `SELECT 1 | 2` had a literal `|` inside an inline-code cell, which the Docusaurus table renderer truncates to SELECT 1 (visible on the live site). Escape the pipe with `|` so it renders as `SELECT 1 | 2`. Applied to all 8 maintained-version files.

Fixes #2464
Fixes #2463