try to fix broken link in standards.rst

Author: JamesPolly-NCO

docs/standards.rst

@@ -18,7 +18,7 @@ Workflow
 
 In the production environment, all jobs are scheduled and submitted to the WCOSS resource manager, PBS Pro, by ecFlow.
 EcFlow is a workflow manager developed and maintained by the European Centre for Medium-Range Weather Forecasts (ECMWF) with an intuitive GUI that is used to handle dependencies, schedule jobs, and monitor the production suite.
-Each job in ecFlow is associated with an ecFlow script which gets processed to generate a ``job card`` (a.k.a. ``submission script``) whose function is to set ``PBS`` (job scheduler) directives and much of the execution environment (see `Standard Environment Variables`_) and call the ``J-job`` to execute processing.
+Each job in ecFlow is associated with an ecFlow script which gets processed to generate a ``job card`` (a.k.a. ``submission script``) whose function is to set ``PBS`` (job scheduler) directives and much of the execution environment (see `A. Standard Environment Variables`_) and call the ``J-job`` to execute processing.
 The processing of the ecFlow script handles the substitution of ecFlow variables and files accessed via "%include" statements;
 the resulting ``job card`` is then handed off to PBS Pro via ``qsub``.
 The purpose of the ``J-job`` is fourfold: to set up location (application/data directory) variables, to set up temporal (date/cycle) variables, to initialize the data and working directories, and to call the ``ex-script``.