Suggest safeguard

Author: jsoref

.github/actions/spelling/line_forbidden.patterns

@@ -563,6 +563,9 @@ CLoud
 # False positive if `/s` is used to mean `per second`
 \s[a-z]{2,}[a-rt-z]/s\s(?=[a-oq-z]\w{2}|p[a-df-z]\w|pe[a-qs-z]|per[a-z])
 
+# Should be `safeguard`
+\bsafe guard\b
+
 # Should be `self-signed`
 \bself signed\b