message: Changelog.md updates (typo fixes)
diff: - Adds terminal identification environment variables `TERMINAL_NAME`, `TERMINAL_VERSION_TRIPLE` and `TERMINAL_VERSION_STRING`.
  - Adds config option `profile.*.maximized: BOOL` to indicate maximized state during profile activation.
  - Adds config option `profile.*.fullscreen: BOOL` to indicate fullscreen state during profile activation.
  -- Adds config option `profile.*.fonts.only_monospace: BOOL` to indicate that only monospace fonts may be used.
  -- Adds config option `profile.*.fonts.TYPE.weight: WEIGHT` and `profile.*.fonts.TYPE.slant: SLANT` options (optional) along with `profile.*.fonts.TYPE.family: STRING`.
  -- Adds config option `profile.*.fonts.TYPE.weight: WEIGHT` and `profile.*.fonts.TYPE.slant: SLANT` options (optional) along with `profile.*.fonts.TYPE.family: STRING`.
  +- Adds config option `profile.*.font.only_monospace: BOOL` to indicate that only monospace fonts may be used.
  +- Adds config option `profile.*.font.TYPE.weight: WEIGHT` and `profile.*.fonts.TYPE.slant: SLANT` options (optional) along with `profile.*.fonts.TYPE.family: STRING`.
  +- Adds config option `profile.*.font.TYPE.weight: WEIGHT` and `profile.*.fonts.TYPE.slant: SLANT` options (optional) along with `profile.*.fonts.TYPE.family: STRING`.
  - Adds config option `profile.*.font.dpi_scale: FLOAT` to apply some additional DPI scaling on fonts.
  - Adds experimental config option `profile.*.font.text_shaping.method: METHOD` with possible values `complex`(defualt, fully featured) and `simple` (most simple with improved performance but less features) for selecting how to perform text shaping.
  - Adds VT sequence for enabling/disabling debug logging. `CSI ? 46 h` and `CSI ? 46 l` and CLI option `-d`.
  