build(deps): bump dexidp/dex from v2.44.0 to v2.45.0 in /dex

Bumps [dexidp/dex](https://github.com/dexidp/dex) from v2.44.0 to v2.45.0.
- [Release notes](https://github.com/dexidp/dex/releases)
- [Commits](dexidp/dex@v2.44.0...v2.45.0)

---
updated-dependencies:
- dependency-name: dexidp/dex
  dependency-version: v2.45.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

dex/Dockerfile

@@ -1,4 +1,4 @@
-FROM ghcr.io/dexidp/dex:v2.44.0 AS dex
+FROM ghcr.io/dexidp/dex:v2.45.0 AS dex
 
 HEALTHCHECK  --interval=30s --timeout=5s --start-period=10s \
     CMD wget --no-verbose --tries=1 --spider http://localhost:5556/dex/.well-known/openid-configuration || exit 1