Update cs.md

update the SUMO link so it points to cs page.
Update de.md

update SUMO link so it points to de page.
Update el.md

Update SUMO link so it points to el page
Update es.md

Update SUMO link so it points to es page
Update hr.md

Update the SUMO link so it points to hr page
Update hu.md

update SUMO link so it points to hu page
Update it.md

Update the SUMO link so it points to "it" page
Update pl.md
Update pt-BR.md

Update SUMO link so it points to pt-BR page
Update sr-LATN.md

Update SUMO link so it points to sr-Cyrl page. SUMO doesn't have sr-Latn page
Update zh-CN.md

Update SUMO link so it points to zh-CN page
Merge pull request #123 from peiying2/patch-14

Update cs.md
Merge pull request #124 from peiying2/patch-15

Update de.md
Merge pull request #133 from peiying2/patch-24

Update zh-CN.md
Merge pull request #132 from peiying2/patch-23

Update sr-LATN.md
Merge pull request #131 from peiying2/patch-22

Update pt-BR.md
Merge pull request #125 from peiying2/patch-16

Update el.md
Merge pull request #126 from peiying2/patch-17

Update es.md
Merge pull request #129 from peiying2/patch-20

Update it.md
Merge pull request #130 from peiying2/patch-21

Update pl.md