chore(deps): bump golang from 1.20.1 to 1.21.5 (external-secrets#2976)

Bumps golang from 1.20.1 to 1.21.5.

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Signed-off-by: Sai Charan Godasi <saicharangodasi@Sais-MacBook-Air.local>

tilt.debug.dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20.1
+FROM golang:1.21.5
 WORKDIR /
 COPY ./bin/external-secrets /external-secrets