Fix bit rate units following international guidelines

Ensure consistent usage of symbols to represent quantities of bits and bytes. For example, the unit symbol for "bit" often appears with a prefix and is denoted by the lowercase letter "b" when abbreviated. When using prefixes like kilo (k), mega (M), giga (G), etc., it becomes crucial to use the correct case to avoid ambiguity. The IEEE 1541 standard provides guidelines for representing these quantities and unit symbols clearly and unambiguously.

IEEE 1541 recommends a set of units to refer to quantities used in digital electronics and computing:

• bit (symbol 'b'), a binary digit.

• byte (symbol 'B'), a set of adjacent bits (usually, but not necessarily, eight) operated on as a group.

• IEEE Standard for Prefixes for Binary Multiples IEEE 1541-2021 https://standards.ieee.org/ieee/1541/6867/ https://ieeexplore.ieee.org/document/9714443

See also:

• The International System of Units (SI) 9th edition https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf § 5.3 Unit names