Update docs/source/getting-started/install.rst

Co-authored-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>

Author: camillem

docs/source/getting-started/install.rst

@@ -121,7 +121,7 @@ Installation as an Application: Downloading Releases
     ScanCode app archives come with packaged with all required dependencies except
     for Python that has to be downloaded and installed separately.
     On more recent versions of Ubuntu, you'll have to install Python 3.8 manually.
-    One possibility to do so is to use Deadsnakes' PPA:
+    One possibility to do so is to use Deadsnakes' PPA::
           sudo apt update && sudo apt upgrade && sudo add-apt-repository ppa:deadsnakes/ppa -y && sudo apt install python3.8 python3.8-distutils