Fix IShellConfiguration documentation (#4897)
Fix IShellConfiguration documentation (#4897)

Changed OrchardCore__Default__State__Placeholder to OrchardCore__Default__State in 'IShellConfiguration' via Environment Variables. "Placeholder" could be the value, not in the actual key.
OrchardCMS/Brochard,xkproject/Orchard2,stevetayloruk/Orchard2,petedavis/Orchard2,stevetayloruk/Orchard2,xkproject/Orchard2,OrchardCMS/Brochard,xkproject/Orchard2,petedavis/Orchard2,stevetayloruk/Orchard2,petedavis/Orchard2,OrchardCMS/Brochard,stevetayloruk/Orchard2,xkproject/Orchard2,xkproject/Orchard2,stevetayloruk/Orchard2,petedavis/Orchard2