Readme.md: update

Readme.md

@@ -51,7 +51,7 @@ sudo apt install borgbackup
 curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
 # Install delta (Ubuntu)
 wget https://github.com/dandavison/delta/releases/download/0.15.1/git-delta_0.15.1_amd64.deb && \
- dpkg -i git-delta_0.15.1_amd64.deb.deb
+ dpkg -i git-delta_0.15.1_amd64.deb
 # Install Imagemagick
 sudo apt install imagemagick
 # Install Rsync (if not already installed)