fix template string

Author: mashehu

nf_core/pipeline-template/.gitpod.yml

@@ -7,4 +7,4 @@ tasks:
 
 vscode:
   extensions:
-    - nf-core.nf-core-extensionpack {%- endif -%}
+    - nf-core.nf-core-extensionpack # https://github.com/nf-core/vscode-extensionpack{% endif %}