Update clone.sh

roles/git-clone/files/clone.sh

 #!/bin/bash
 
 GIT_URL="https://code.fbi.h-da.de/pse-ai-at-the-edge/ai-at-the-edge.git"
-DIRECTORY_NAME="ai-at-the-edge"
+REPO_DIR_NAME="ai-at-the-edge"
 CLONE_DIRECTORY="$HOME/notebooks"
 
 mkdir -p $CLONE_DIRECTORY
-cd $CLONE_DIRECTORY
-if test -d "$DIRECTORY_NAME"; then
-  # directory already exists.
-  exit
-else
+if [ ! -d "$CLONE_DIRECTORY/$REPO_DIR_NAME" ]; then
   # directory does not exist. Clone the repo
-  git clone $GIT_URL $DIRECTORY_NAME
-fi
\ No newline at end of file
+  git clone $GIT_URL "$CLONE_DIRECTORY/$REPO_DIR_NAME"
+fi