Add apps/progs.h to gitignore

Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3692)

.gitignore

@@ -26,6 +26,7 @@ Makefile
 
 # Auto generated headers
 /crypto/buildinf.h
+/apps/progs.h
 /crypto/include/internal/*_conf.h
 /openssl/include/opensslconf.h
 /util/domd