[xen stable-4.17] README: make heading say 4.17

[patchbot@xxxxxxx]

commit 9da9560a53f485a4d1f82cff462151503f6bb770
Author:     Julien Grall <julien@xxxxxxx>
AuthorDate: Wed Dec 7 20:01:21 2022 +0000
Commit:     Julien Grall <julien@xxxxxxx>
CommitDate: Wed Dec 7 20:09:38 2022 +0000

    README: make heading say 4.17
---
 README | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/README b/README
index 2fdca8861b..a947e8f3e3 100644
--- a/README
+++ b/README
@@ -1,11 +1,11 @@
-###############################################
+###################################
 __  __            _  _    _ _____
-\ \/ /___ _ __   | || |  / |___  |    _ __ ___
- \  // _ \ '_ \  | || |_ | |  / /____| '__/ __|
- /  \  __/ | | | |__   _|| | / /_____| | | (__
-/_/\_\___|_| |_|    |_|(_)_|/_/      |_|  \___|
+\ \/ /___ _ __   | || |  / |___  |
+ \  // _ \ '_ \  | || |_ | |  / /
+ /  \  __/ | | | |__   _|| | / /
+/_/\_\___|_| |_|    |_|(_)_|/_/
 
-###############################################
+##################################
 
 https://www.xen.org/
 
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generated by git-patchbot for /home/xen/git/xen.git#stable-4.17