Update README with improved listing of supported types.

README.md

@@ -8,20 +8,26 @@
 
 - [`bfloat16`](https://en.wikipedia.org/wiki/Bfloat16_floating-point_format):
  an alternative to the standard [`float16`](https://en.wikipedia.org/wiki/Half-precision_floating-point_format) format
-- `float8_*`: several experimental 8-bit floating point representations
- including:
+- 8-bit floating point representations, parameterized by number of exponent and
+ mantissa bits, as well as the bias (if any) and representability of infinity,
+ NaN, and signed zero.
  * `float8_e3m4`
  * `float8_e4m3`
  * `float8_e4m3b11fnuz`
  * `float8_e4m3fn`
  * `float8_e4m3fnuz`
  * `float8_e5m2`
  * `float8_e5m2fnuz`
-- Microscaling (MX) sub-byte floating point representations including:
+ * `float8_e8m0fnu`
+- Microscaling (MX) sub-byte floating point representations:
  * `float4_e2m1fn`
  * `float6_e2m3fn`
  * `float6_e3m2fn`
-- `int2`, `int4`, `uint2` and `uint4`: low precision integer types.
+- Narrow integer encodings:
+ * `int2`
+ * `int4`
+ * `uint2`
+ * `uint4`
 
 See below for specifications of these number formats.