Description

Standardizes all environment variable references in documentation to use uppercase naming convention (NPM_CONFIG_) instead of lowercase (npm_config_).

Changes

• Changed npm_config_binroot to NPM_CONFIG_BINROOT in scripts.md
• Changed npm_config_prefix to NPM_CONFIG_PREFIX in npm.md (2 instances)
• Changed npm_config_ to NPM_CONFIG_ in npm.md
• Changed npm_config_key to NPM_CONFIG_KEY in npm.md

Fixes

Closes #4891

Rationale

The documentation had inconsistent casing for environment variables - some references used uppercase (NPM_CONFIG_USERCONFIG) while others used lowercase (npm_config_prefix). Following the standard convention, environment variables should always be referenced in uppercase. While npm internally converts both to lowercase, using uppercase in documentation follows the de-facto standard and avoids confusion.

Type of Change

Documentation update