Fix Windows charmap exception for quote characters

FreddieDev · savon-noir · commit 8f442747a7a1 · 2021-09-13T15:42:15.000+02:00
When installing on Windows with `pip install python-libnmap`, these characters cause the error:
```
UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 1117: character maps to &lt;undefined&gt;
```
diff --git a/README.rst b/README.rst
@@ -36,10 +36,10 @@ The lib currently offers the following modules:
    de/serialize scan results in a json format
 -  **diff**: enables you to see what changed between two scans
 -  **common**: contains basic nmap objects like NmapHost and
-   NmapService. It is to note that each object can be “diff()ed” with
+   NmapService. It is to note that each object can be "diff()ed" with
    another similar object.
 -  **plugins**: enables you to support datastores for your scan results
-   directly in the “NmapReport” object. from report module:
+   directly in the "NmapReport" object. from report module:
 
    -  mongodb: insert/get/getAll/delete
    -  sqlalchemy: insert/get/getAll/delete
