Use Linux 6.10 in build-many-glibcs.py

Tested with build-many-glibcs.py (host-libraries, compilers and glibcs
builds).
Reviewed-by: Florian Weimer <[email protected]>

Author: zatrazz

scripts/build-many-glibcs.py

@@ -834,7 +834,7 @@ def checkout(self, versions):
                             'gcc': 'vcs-13',
                             'glibc': 'vcs-mainline',
                             'gmp': '6.3.0',
-                            'linux': '6.9',
+                            'linux': '6.10',
                             'mpc': '1.3.1',
                             'mpfr': '4.2.1',
                             'mig': 'vcs-mainline',