MAINT: Add make to Pixi::doc feature (#11457)

Author: VeckoTheGecko

pixi.toml

@@ -241,6 +241,7 @@ sphinxext-opengraph = "*"
 sphinxext-rediraffe = "*"
 cfgrib = "*"
 myst-parser = "*"
+make = "*"
 
 [feature.doc.tasks]
 doc = { cmd = "make html", cwd = "doc", description = "Build the HTML documentation." }