all.bash: update prettier file glob
all.bash: update prettier file glob

Updates prettier file glob to ignore JS files
and process TS files. The repo should not contain
any JS files outside of generated or minified code.

Change-Id: I1167b96c1d0d2ab2da5e9cf4d40c2b2fd79e70fd
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/320990
Trust: Jamal Carvalho <e0195770807aa8c82b0b128d9c0423b5ad035172@golang.org>
Run-TryBot: Jamal Carvalho <e0195770807aa8c82b0b128d9c0423b5ad035172@golang.org>
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>
TryBot-Result: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

golang/pkgsite,golang/pkgsite,golang/pkgsite,golang/pkgsite