chore(terminal-academy): bump submodule to hardened HEAD 3a3927b (gitleaks + omz URL + gitignore fixes)

fidgetcoding · fidgetcoding · commit 6ce68f8a1b1e · 2026-07-03T00:12:33.000-04:00
diff --git a/terminal-academy b/terminal-academy
@@ -1 +1 @@
-Subproject commit 86d24c916c20f176b45e9b2898bd2b463a35d1e0
+Subproject commit 3a3927b7fe905bdb17afbd4b47331ce266a5c416
