_content/doc/tutorial/greetings-multiple-people.html: Add missing Indication of changes

[Lukas-J]

In line 162 the argument of Hellos changes from "Gladys" into names. The indication of a change was missing in the code block.

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[Lukas-J]

@googlebot I signed it!

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Patch Set 1:

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Patch Set 5: Code-Review+1

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Patch Set 6: Code-Review+1

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[Lukas-J]

I just saw that there are 3 other pull requests concerning this issue:
#49
#121
#135

@sethbattin is waiting since April to get approved...

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Patch Set 8:

(1 comment)

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Patch Set 8:

(1 comment)

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