References-tables.md: repair broken table
References-tables.md: repair broken table

At https://mesonbuild.com/Reference-tables.html#compiler-and-linker-selection-variables, the table is broken and it seems that the only difference with other well-working tables on this page is the semi-column ":" that are present under Language.
jpakkane/meson,mesonbuild/meson,pexip/meson,jpakkane/meson,jpakkane/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,becm/meson,jpakkane/meson,QuLogic/meson,mesonbuild/meson,QuLogic/meson,QuLogic/meson,mesonbuild/meson,mesonbuild/meson,QuLogic/meson,pexip/meson,pexip/meson,pexip/meson,becm/meson,pexip/meson,pexip/meson,mesonbuild/meson,QuLogic/meson,becm/meson,QuLogic/meson,QuLogic/meson,becm/meson,jpakkane/meson,becm/meson,mesonbuild/meson,jpakkane/meson,becm/meson,becm/meson,QuLogic/meson,becm/meson,becm/meson,becm/meson,QuLogic/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,mesonbuild/meson