fix cross reference error

ggciag / mandyoc

MANDYOC is a finite element code written on top of the PETSc library to simulate thermo-chemical convection of the Earth's mantle

https://ggciag.github.io/mandyoc/

BSD 3-Clause "New" or "Revised" License

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Closed rafaelmds closed 2 years ago

rafaelmds commented 2 years ago

Some missing white space in figure legend was causing a cross reference error and hence not numbering figures correctly.

This just add missing space to fix this cross reference error.