bootstrap: Update to 4.5.0

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/bootstrap b/src/bootstrap
index dca1ab7d877bc4b664b43604657a2b5fbe2b4ecb..7a6da5e3e7ad7c749dde806546a35d4d4259d965 160000 (submodule)
--- a/src/bootstrap
+++ b/src/bootstrap
@@ -1 +1 @@
-Subproject commit dca1ab7d877bc4b664b43604657a2b5fbe2b4ecb
+Subproject commit 7a6da5e3e7ad7c749dde806546a35d4d4259d965