Update firmware on Raspberry pi

sudo apt-get install rpi-update
sudo rpi-update

rpi-update

root@raspberrypi:~# sudo rpi-update
 *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom
 *** Performing self-update
 *** Relaunching after update
 *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom
FW_REV:9a3a5f6db80eb8cc18e3d5b265422a23a8bbeddd
 *** We're running for the first time
 *** Backing up files (this will take a few minutes)
 *** Remove old firmware backup
 *** Backing up firmware
 *** Remove old modules backup
 *** Backing up modules 4.19.66-v7+
WANT_32BIT:1 WANT_64BIT:0 WANT_PI4:0
#############################################################
WARNING: This update bumps to rpi-6.1.y linux tree
See: https://forums.raspberrypi.com/viewtopic.php?t=344246

'rpi-update' should only be used if there is a specific
reason to do so - for example, a request by a Raspberry Pi
engineer or if you want to help the testing effort
and are comfortable with restoring if there are regressions.

DO NOT use 'rpi-update' as part of a regular update process.
##############################################################
Would you like to proceed? (y/N)
 *** Downloading specific firmware revision (this will take a few minutes)

rpi-update

root@raspberrypi:/# rpi-update
 *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom
 *** Performing self-update
 *** Relaunching after update
 *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom
FW_REV:01d087eb85aa5514d79b90566a000b2ca0a4fab8
 *** We're running for the first time
 *** Backing up files (this will take a few minutes)
 *** Remove old firmware backup
 *** Backing up firmware
 *** Remove old modules backup
 *** Backing up modules 4.19.66-v7+
WANT_32BIT:1 WANT_64BIT:0 WANT_PI4:0
#############################################################
WARNING: This update bumps to rpi-6.1.y linux tree
See: https://forums.raspberrypi.com/viewtopic.php?t=344246

'rpi-update' should only be used if there is a specific
reason to do so - for example, a request by a Raspberry Pi
engineer or if you want to help the testing effort
and are comfortable with restoring if there are regressions.

DO NOT use 'rpi-update' as part of a regular update process.
##############################################################
Would you like to proceed? (y/N)

 *** Downloading specific firmware revision (this will take a few minutes)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
100  117M  100  117M    0     0  2026k      0  0:00:59  0:00:59 --:--:--  173k
 *** Updating firmware
 *** Updating kernel modules
 *** depmod 6.1.53+
 *** depmod 6.1.53-v7+
 *** Updating VideoCore libraries
 *** Using HardFP libraries
 *** Updating SDK
 *** Running ldconfig
 *** Storing current firmware revision
 *** Deleting downloaded files
 *** Syncing changes to disk
 *** If no errors appeared, your firmware was successfully updated to 01d087eb85aa5514d79b90566a000b2ca0a4fab8
 *** A reboot is needed to activate the new firmware
root@raspberrypi:/#