SNOW-990111 Update easy logging documentation (#875)

### Description
SNOW-990111 Update easy logging documentation

### Checklist
- [x] Code compiles correctly
- [x] Code is formatted according to [Coding
Conventions](../CodingConventions.md)
- [x] Created tests which fail without the change (if possible)
- [x] All tests passing (`dotnet test`)
- [x] Extended the README / documentation, if necessary
- [x] Provide JIRA issue id (if possible) or GitHub issue id in PR name

README.md

@@ -793,14 +793,15 @@ The feature is activated by a config file which can be:
 2. provided as environmental variable called `SF_CLIENT_CONFIG_FILE` (eg. `SET SF_CLIENT_CONFIG_FILE=C:\some-path\client_config.json`)
 3. found in the driver location by searching for `sf_client_config.json` file
 4. found in the home location by searching for `sf_client_config.json` file
-5. found in temp directory location by searching for `sf_client_config.json` file
 
 The search for a config file is executed in the order listed above.
 
 To minimize the number of searches for a configuration file it is executed only:
 - for the first connection
 - for the first connection with `CLIENT_CONFIG_FILE` parameter.
 
+On Unix-style systems, client configuration file permissions are expected to have a limitation that only the file owner can modify the files (e.g. 600, 644).
+
 The example of the configuration file is:
 ```json
 {