[translations] Actions & travis

[cvvergara]

Travis is taking around 16 minutes to check links in 4 languages

Move the link checking of languages to github actions as they can run in parallel, it takes less time to check the links.

How "should" it work:

• English links is always checked
• if the (last) commit message has the string [<lang>] that language links is checked

for example:

Commit msg	Action
[es] updating links	will only trigger Spanish translations link checking. (and English)
[es][de] downloading translations	will trigger Spanish & German translations link checking. (and English)
change mapserver version	will trigger only the English link checking

[cvvergara]

Not so sure what to do

How I am making it work:

• English is checked only when there is no language specified
• if the (last) commit message has the string [<lang>] that language links is checked

for example:

Commit msg	Action
[es] updating links	will only trigger Spanish translations link checking.
[es][de] downloading translations	will trigger Spanish & German translations link checking.
change mapserver version	will trigger only the English link checking

[cvvergara]

Thinking it over, I will do the option that always checks the English Just in case there is a problem with the English, like a new broken link.

[cvvergara]

PR here: ​https://github.com/OSGeo/OSGeoLive-doc/pull/602

[cvvergara]

PR has been merged