Fix u-boot menu version

- An incorrect match was causing errors on the server
  (1 field instead of 3)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>

projects/u-boot.sh

@@ -5,7 +5,7 @@ list_tags_h()
     echo "$tags" |
     grep '^v20' |
     tac |
-    sed -r 's/^(v20..)\.([0-9][0-9])\.(.*)$/\1 \1.\2 \1.\2.\3/'
+    sed -r 's/^(v20..)\.([0-9][0-9])(.*)$/\1 \1.\2 \1.\2\3/'
 
     echo "$tags" |
     grep -E '^(v1|U)' |