Small change to where shell scripts live in demo/README.md (#545)

Paths in README modified to point to demo/basic/<script-name>.sh from demo/<script-name>.sh which was incorrect according to the current repository.

scripts/demo/README.md

@@ -42,7 +42,7 @@ a running agent.  To run the `-agent` commands, a single agent or set of agents
 many scripts require a set of witnesses be running locally.  The following section details how to run agents and witnesses.
 
 ### Running Witnesses
-Witnesses can be started in several ways using the `kli witness` subcommands or the shell script `demo/start-witness.sh`.  The
+Witnesses can be started in several ways using the `kli witness` subcommands or the shell script `demo/basic/start-witness.sh`.  The
 following 2 subcommands are available for starting witnesses:
 
 * `kli witness start` - starts a single witness (used inside the start-witness.sh script)
@@ -51,7 +51,7 @@ following 2 subcommands are available for starting witnesses:
 For most of the scripts that require witnesses you will use `kli witness demo` to start the 3 known witnesses.
 
 ### Running Agents
-Agents can be started in several ways using the `kli agent` subcommands or the shell script `demo/start-agent.sh` for the 
+Agents can be started in several ways using the `kli agent` subcommands or the shell script `demo/basic/start-agent.sh` for the 
 scripts that execute `curl` commands against running agents.  The following 3 subcommands are available for starting
 agents:
 
@@ -85,4 +85,4 @@ and running the scripts.  For example, before each script running something like
 
 `rm -rf /usr/local/var/keri/*;kli witness demo`
 
-creates a clean environment and starts the demo set of 3 known witnesses.
+creates a clean environment and starts the demo set of 3 known witnesses.