test(cli): Verify shttp shows up

crates/typos-cli/tests/cmd/false-positives.in/README.md

@@ -5,3 +5,5 @@ git glossary has both commitish and committish, so don't correct them
 HTTP_REFERER is a valid HTTP header field
 
 It should be reasonable to talk about `<thead>`
+
+SHTTP is a protocol

crates/typos-cli/tests/cmd/false-positives.toml

@@ -1,4 +1,12 @@
 bin.name = "typos"
 stdin = ""
-stdout = ""
+stdout = """
+error: `SHTTP` should be `HTTPS`
+  --> ./README.md:9:1
+  |
+9 | SHTTP is a protocol
+  | ^^^^^
+  |
+"""
 stderr = ""
+status.code = 2