[web] Use page bundle resource in img shortcode.

...enchmarks/heat-transport-bhe/3D_coaxial_deep_BHE/index.md

...cs/benchmarks/heatconduction/BHE_array_benchmark/index.md

...ks/hydro-mechanics/lie-hm-linear-single-fracture/index.md

...ant_allascomponents/KineticReactant2/KineticReactant2.gif

...kineticreactant_allascomponents/KineticReactant2/index.md

...rks/reactive-transport/radionuclide/radionuclide/Fig2.gif

...rks/reactive-transport/radionuclide/radionuclide/index.md

...chmarks/reactive-transport/wetland/Wetland/Wetland_1d.gif

...cs/benchmarks/reactive-transport/wetland/Wetland/index.md

web/layouts/shortcodes/img.html