Renaming a jpg file also causes the raw file with same name to rename.
Example: Renaming IMG8023.jpg. However, IMG8023.cr2 also renames.
To rename, I select the filename in the Content panel. The filename highlights. I change the name (add to the existing name: "InstrumentIMG8023."). Both IMG8023.jpg and IMG8023.cr2 rename simultaneously. FYI, I created the .jpg from the raw file - the jpg was not camera generated if it matters.