Update install.sh, deletes miniconda installer if interrupted

Potential errors could be avoided and resources can be saved if the miniconda installer is deleted before downloading it again.

This is in the case the script is interrupted before the download is completed.

I thought that it would be better if it instead checked if it was already there, just so it doesn't have to download it again, but that would cause issues in case the existing file is incomplete or corrupted

install.sh

@@ -365,6 +365,7 @@ install_st_extras_pre() {
     git clone https://github.com/SillyTavern/SillyTavern-extras.git
 
     # Download the Miniconda installer script
+    rm /tmp/$miniconda_installer
     wget https://repo.anaconda.com/miniconda/$miniconda_installer -P /tmp
     chmod +x /tmp/$miniconda_installer
 
@@ -981,4 +982,4 @@ elif command -v zypper &>/dev/null; then
 else
     log_message "ERROR" "${red_fg_strong}Unsupported package manager. Cannot detect Linux distribution.${reset}"
     exit 1
-fi
+fi