metrics.generateReportMarkdown() creates "invalid" table-markdown

[MielkeDaniel]

The table header should be split from the tableb body using hyphens instead of equal signs.
Currently it creates something like this:

| Type | File   | Logic Contracts | Interfaces | Lines | nLines | nSLOC | Comment Lines | Complex. Score | Capabilities |
|========|=================|============|=======|=======|===============|==============|  

while it should look like this:

| Type | File   |  Logic Contracts | Interfaces | Lines | nLines  | nSLOC | Comment Lines | Complex. Score | Capabilities                                                                                                                                                    |
| ---- | ------------------ | ---------- | -------- | -------- | -------- | ------- | ---------- | ----------- | ---------- |

This error right now results in the table not being dispalyed correctly in the .md or it also can´t be converted into html.

[tintinweb]

fixed. even had the wrong column count 🤦 thanks @MielkeDaniel 🙌