ignore/types: add embedded puppet templates

.epp files are getting more and more common in Puppet code bases so it
makes sense I think to include them as part of the "puppet" type.

https://puppet.com/docs/puppet/7/lang_template_epp.html

PR BurntSushi#2141

crates/ignore/src/default_types.rs

@@ -178,7 +178,7 @@ pub const DEFAULT_TYPES: &[(&str, &[&str])] = &[
     ("postscript", &["*.eps", "*.ps"]),
     ("protobuf", &["*.proto"]),
     ("ps", &["*.cdxml", "*.ps1", "*.ps1xml", "*.psd1", "*.psm1"]),
-    ("puppet", &["*.erb", "*.pp", "*.rb"]),
+    ("puppet", &["*.epp", "*.erb", "*.pp", "*.rb"]),
     ("purs", &["*.purs"]),
     ("py", &["*.py"]),
     ("qmake", &["*.pro", "*.pri", "*.prf"]),