Cannot find symbol: arc.graphics.g2d.TextureAtlas.TextureAtlasData.Page

[Filius-Patris]

Currently building the wiki fails because of this error:

> Task :compileJava
/home/runner/work/wiki/Mindustry-Wiki-Generator/src/wikigen/image/TextureUnpacker.java:5: error: cannot find symbol
import arc.graphics.g2d.TextureAtlas.TextureAtlasData.Page;
                                                     ^
  symbol:   class Page
  location: class TextureAtlasData
/home/runner/work/wiki/Mindustry-Wiki-Generator/src/wikigen/image/TextureUnpacker.java:37: error: cannot find symbol
        for(Page page : atlas.getPages()){
            ^
  symbol:   class Page
  location: class TextureUnpacker

https://github.com/MindustryGame/wiki/runs/1891615361?check_suite_focus=true#step:9:966

This keeps the Mindustry wiki from updating. I would've liked to contribute too, but I can't check if my documentation builds successfully...

[Anuken]

Fixed in PR.