Bump golang from 1.17-alpine to 1.20-alpine in /schemas (#151)

Bumps golang from 1.17-alpine to 1.20-alpine.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Bogdan Drutu <bogdandrutu@gmail.com>

schemas/Dockerfile

@@ -1,6 +1,6 @@
 ## Build
 ##
-FROM golang:1.17-alpine AS build
+FROM golang:1.20-alpine AS build
 
 WORKDIR /app