Add manan and florent to Docker files CODEOWNERS (#11983)

Signed-off-by: Florent Poinsard <florent.poinsard@outlook.fr>

Signed-off-by: Florent Poinsard <florent.poinsard@outlook.fr>
Co-authored-by: Florent Poinsard <florent.poinsard@outlook.fr>

.github/CODEOWNERS

@@ -4,7 +4,7 @@ bootstrap.sh @ajm188 @deepthi @frouioui @vmg
 /.github/workflows/ @deepthi @frouioui @mattlord
 /config/mycnf/ @deepthi @shlomi-noach @mattlord
 /doc/ @deepthi @frouioui @GuptaManan100 @rsajwani
-/docker/ @deepthi @derekperkins @dkhenry @mattlord
+/docker/ @deepthi @derekperkins @dkhenry @mattlord @GuptaManan100 @frouioui
 /examples/compose @shlomi-noach @GuptaManan100 @frouioui
 /examples/demo @mattlord @rohit-nayak-ps
 /examples/legacy_local @deepthi