RELNOTES: reword/move syscall headers item to 0.9.78

It was released in 0.9.78.

Related commits:

* ff1f53f1e ("include new generated syscall_*.h header files",
  2025-12-27)
* af59f6173 ("Merge pull request #7000 from pierretom/patch7",
  2026-01-07)
* 01b741aa8 ("RELNOTES and some more testing", 2026-02-25)
* 8ca11b335 ("RELNOTES: improve and move items into build items",
  2026-02-27)

Relates to #7000.

README

@@ -1023,8 +1023,8 @@ pierretom (https://github.com/pierretom)
 	- build: add script to generate syscall headers (#6960)
 	- modif: update and add syscalls for several architectures (#6956
 	  #6961)
+	- modif: include new generated syscall headers (#7000)
 	- added --debug-syscall-groups command (88a75a6 etc.)
-	- build: support syscalls for many more architectures (#7000)
 	- reorganize & update syscall groups  (#7024 etc.)
 	- docs: man: fix arch for syscall map in seccomp example (#7064)
 pirate486743186 (https://github.com/pirate486743186)

RELNOTES

@@ -28,7 +28,6 @@ firejail (0.9.79) baseline; urgency=low
     option (d1a58de)
   * build: remove ./configure --disable-man option (a655b7d)
   * build: remove ./configure --disable-usertmpfs option (b214d08)
-  * build: support syscalls for many more architectures (#7000)
   * build: fix discarded const qualifier compiler warnings (#7068)
   * ci: gitlab: install missing git-buildpackage dependency (#7017)
   * ci: gcov testing scripts update
@@ -60,6 +59,7 @@ firejail (0.9.78) baseline; urgency=low
   * modif: rlimit: use uppercase suffixes in the code/docs (#6891)
   * modif: rlimit: improve error messages (#6893)
   * modif: update and add syscalls for several architectures (#6956 #6961)
+  * modif: include new generated syscall headers (#7000)
   * modif: check for --version during early init (#6972)
   * removal: --disable-globalcfg configure option (#6984)
   * removal: overlayfs support/--overlay commands (#6994)