temp/plasma-nano: upgrade to 5.19.5_git20200728

Make sure our package is a higher version than the one in Alpine

temp/plasma-nano/APKBUILD

 # Forked from Alpine to package newer commits
 pkgname=plasma-nano
-pkgver=5.19.4_git20200728
+pkgver=5.19.5_git20200728
 pkgrel=0
 _commit="6db2dec1e1a38efd17b4b1bf67928e180ee1bb08"
 pkgdesc="A minimal Plasma shell package intended for embedded devices"