docs: fix cyclonedx-go version in compatibility matrix

Signed-off-by: nscuro <nscuro@protonmail.com>

Author: nscuro

README.md

@@ -30,7 +30,7 @@ Also, checkout the [`examples`](./example_test.go) to get an idea of how this li
 |:---------------------:|:---------------------:|:------------------------:|
 |       < v0.4.0        |         1.14+         |           1.2            |
 |       == v0.4.0       |         1.14+         |           1.3            |
-|       >= v0.5.0       |         1.15+         |           1.4            |
+|  >= v0.5.0, < v0.7.0  |         1.15+         |           1.4            |
 |       >= v0.7.0       |         1.17+         |         1.0-1.4          |
 
 We're aiming to support all [officially supported](https://golang.org/doc/devel/release.html#policy) Go versions, plus