chore(deps): update gameservermanagers/gameserver:gmod docker digest to a75dc22 (#279)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

images/gmod-base/Dockerfile

@@ -1,6 +1,6 @@
 FROM hairyhenderson/gomplate:v4.3.0@sha256:5e24d79d00b99d22ac248473ac09dc3a06f41024ca78d6905650057f296206cb AS gomplate
 
-FROM gameservermanagers/gameserver:gmod@sha256:3008581e4d4f0bed1f60d08f528f1ed8985c6fdd3bbf2b2c3583d1db26a0cf24
+FROM gameservermanagers/gameserver:gmod@sha256:a75dc22698ed15f586c05d18a7e141a4aa47a868422715aea350b9dce87cc757
 ARG IMAGE_DIR
 
 # Override entrypoint-user to support hooks