codeowners: add @e-rk and @tomchy to flash_companion codeowners

Added Rafał Kuźnia (@e-rk) as flash_companion sample code owner.
Added Tomasz Chyrowicz (@tomchy) as flash companion sample code owner.

Signed-off-by: Rafał Kuźnia <[email protected]>

Author: e-rk

CODEOWNERS

@@ -202,6 +202,7 @@ Kconfig*                                  @tejlmand
 /samples/sdfw/                            @hakonfam @jonathannilsen
 /samples/sdfw/ssf_client/                 @anhmolt
 /samples/suit/                            @tomchy @ahasztag
+/samples/suit/flash_companion/            @e-rk @tomchy
 /samples/wifi/provisioning/               @wentong-li @bama-nordic
 /samples/wifi/radio_test/                 @bama-nordic @sachinthegreen
 /samples/wifi/scan/                       @D-Triveni @bama-nordic