trace-cmd: Documentation: ignore all man sections

Today, we only ignore section 1. But we also have a section 5 man page.

---
 Documentation/.gitignore | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index f7e585b..aecd243 100644
@@ -1 +1 @@
-*.1
+*.[1-9]

2.5.5