TRIVIAL: Bump golang from 1.16 to 1.23

Bumps golang from 1.16 to 1.23.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Dockerfile

@@ -1,5 +1,5 @@
 # Build the doctor binary
-FROM golang:1.16 as builder
+FROM golang:1.23 as builder
 
 WORKDIR /github.com/wandera/spot-termination-handler