Refs #11084 Restore the correct heading level for workflows

Code/Mantid/docs/source/algorithms/AlignAndFocusPowder-v1.rst

@@ -33,7 +33,7 @@ sub-algorithms as listed below.
 #. :ref:`algm-ConvertUnits` to time-of-flight
 
 Workflow
---------
+########
 
 .. diagram:: AlignAndFocusPowder-v1_wkflw.dot
 

Code/Mantid/docs/source/algorithms/DgsRemap-v1.rst

@@ -14,7 +14,7 @@ workspace. One can use the ExecuteOppositeOrder to do grouping first
 then masking.
 
 Workflow
---------
+########
 
 .. diagram:: DgsRemap-v1_wkflw.dot
 

Code/Mantid/docs/source/algorithms/MuonLoad-v1.rst

@@ -22,7 +22,7 @@ Specifically:
    resulting workspace.
 
 Workflow
---------
+########
 
 .. diagram:: MuonLoad-v1_wkflw.dot