Fix temperature value calculation for ds18s20

[sasodoma]

The DS18S20 returns a 9 bit temperature value. The value is a signed integer scaled by a factor of two, for 0.5 °C resolution. The integer part was calculated correctly using integer division by two. The decimal had one zero too much in the multiplication factor, thus would either add 0 or 5 to the total value instead of 0 or 0.5.

[github-actions]

Hello @sasodoma, and thank you very much for your first pull request to the Zephyr project!
Our Continuous Integration pipeline will execute a series of checks on your Pull Request commit messages and code, and you are expected to address any failures by updating the PR. Please take a look at our commit message guidelines to find out how to format your commit messages, and at our contribution workflow to understand how to update your Pull Request. If you haven't already, please make sure to review the project's Contributor Expectations and update (by amending and force-pushing the commits) your pull request if necessary.
If you are stuck or need help please join us on Discord and ask your question there. Additionally, you can escalate the review when applicable. 😊

[sasodoma]

Reading the commit message guidelines, I realized that my commit message does not follow them. What is the simplest way for me to correct that?

[pyhys]

In general, to modify the commit message use git commit --amend and then edit the message. Use force-push to send it to github, typically git push origin YOUR_BRANCH_NAME -f

That will change the commit message, as seen on https://github.com/zephyrproject-rtos/zephyr/pull/97014/commits

If you would like to change the text on the #97014 page, click the three dots and then "Edit".

I do not have permissions to approve the workflow. If it takes several days before someone approves the workflow, then I suggest you ask someone on discord to approve it. Once you have previous contributions to the project, you do not need to wait for approval to run the workflow.

[sasodoma]

Thank you, I wasn't sure if it was ok to amend and force push. I have now updated the commit message to be in line with the guidelines.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud