Update entrypoint.sh

if there is both a unity package and a test-project in one github repo, then the token generation process is created Library folder and then the build of the test project breaks. Requires a tilde to ignore Library folder in _activate-license.
Or need set the path ACTIVATE_LICENSE_PATH from the global ENV in runtime-action

dist/entrypoint.sh

@@ -4,7 +4,7 @@
 # Create directory for license activation
 #
 
-ACTIVATE_LICENSE_PATH="$GITHUB_WORKSPACE/_activate-license"
+ACTIVATE_LICENSE_PATH="$GITHUB_WORKSPACE/_activate-license~"
 mkdir -p "$ACTIVATE_LICENSE_PATH"
 
 #