Add spanish translation for #100CoolWebMoments

[claudiojara]

Fixes #SOME_ISSUE_NUMBER

Changes proposed in this pull request:

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[chrome-devrel-infra[bot]]

:white_check_mark: Preview (static) for commit d9a0782869a20608d4b96b06f3e1fad4636e73c8 available at https://pr-7841-static-dot-dcc-staging.uc.r.appspot.com/.

The following pages likely changed with this PR:

• https://pr-7841-static-dot-dcc-staging.uc.r.appspot.com/es/100/