If prompted, select the version for Mac with Intel chip or Mac with Apple chip. Most devices running 10.15.7 are Intel-based, but you can verify this by clicking the Apple icon in your menu bar and selecting About This Mac.
Since you are stuck on version 115 (or 116 with reduced support), you cannot rely on automatic updates forever. Here is how to stay safe: Download Chrome For Mac 10.15.7
Download the .dmg file, open it, and drag Chrome into your Applications folder. If prompted, select the version for Mac with
While running Chrome 119 allows you to browse the web, you must be aware of the long-term trade-offs associated with legacy software. Security Risks Here is how to stay safe: Download the
If your hardware supports it, the best path is to update your Mac to macOS 11 (Big Sur) or newer via System Preferences > Software Update