what-is-new-in-perl.md: typo fix: age -> get_age

[oalders]

@manwar, could you please review this?

[manwar]

@oalders just submitted the pull request to fix the code: https://github.com/perladvent/perldotcom/pull/377

[manwar]

@532910 can please you update the line below:

   86:     If you noticed, the method `name()` and `age()` is just a generic `getter` method.

with

   86:     If you noticed, the method `name()` and `get_age()` is just a generic `getter` method.

[manwar]

@oalders just submitted the pull request to fix the code: #377

@oalders please ignore my pull request #377, I have closed it anyway.

[532910]

@532910 can please you update the line below:

   86:     If you noticed, the method `name()` and `age()` is just a generic `getter` method.

with

   86:     If you noticed, the method `name()` and `get_age()` is just a generic `getter` method.

updated

[532910]

Thank you for so nice article, @manwar!