chore: Included githubactions in the dependabot config

This should help with keeping the GitHub actions updated on new releases. This will also help with keeping it secure.

Dependabot helps in keeping the supply chain secure https://docs.github.com/en/code-security/dependabot

GitHub actions up to date https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot

https://github.com/ossf/scorecard/blob/main/docs/checks.md#dependency-update-tool
Signed-off-by: nathannaveen <42319948+nathannaveen@users.noreply.github.com>
12 jobs for pr/1659 in 25 minutes and 19 seconds (queued for 3 seconds)
Name Stage Failure
failed
robotpkg-py-pinocchio-16.04 Test
ERROR:
ERROR: See /root/robotpkg/math/pinocchio/work/sysdep.log for details.
ERROR: ======================================================================
make: *** [do-bootstrap-depends] Error 1
/root/robotpkg/mk/depends/bootstrap.mk:44: recipe for target 'do-bootstrap-depends' failed
make: *** [checkout] Error 2
/root/robotpkg/mk/internal/trusted.mk:40: recipe for target 'checkout' failed
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

failed
format Test
./bindings/python/pinocchio/derivative/dcrba.py:451:13: E231 missing whitespace after ','
./bindings/python/pinocchio/derivative/dcrba.py:451:40: E231 missing whitespace after ','
./bindings/python/pinocchio/derivative/dcrba.py:451:51: E231 missing whitespace after ','
./bindings/python/pinocchio/derivative/dcrba.py:451:55: E231 missing whitespace after ','
./bindings/python/pinocchio/derivative/dcrba.py:451:58: E231 missing whitespace after ','
./bindings/python/pinocchio/derivative/dcrba.py:452:34: E231 missing whitespace after ','
./bindings/python/pinocchio/derivative/dcrba.py:455:1: W293 blank line contains whitespace
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

failed
robotpkg-pinocchio-16.04 Test

For details or bug reports, check the complete log file in:
/root/robotpkg/math/pinocchio/work/build.log
make: *** [do-build-make(/root/robotpkg/math/pinocchio/work/pinocchio-2.6.5)] Error 2
/root/robotpkg/mk/build/build.mk:204: recipe for target 'do-build-make(/root/robotpkg/math/pinocchio/work/pinocchio-2.6.5)' failed
make: *** [install] Error 2
/root/robotpkg/mk/internal/trusted.mk:40: recipe for target 'install' failed
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1