Fix templates file glob

For fixing the follow build error:

[13 of 13] Compiling Main             ( BuildClient.hs, dist/dist-sandbox-d7b5c57b/build/hackage-build/hackage-build-tmp/Main.o )
Linking dist/dist-sandbox-d7b5c57b/build/hackage-build/hackage-build ...
cabal: filepath wildcard 'templates/UserSignupReset/*.st' does not match any
files.
Failed to install hackage-server-0.4