Update module github.com/prometheus/client_golang to v1.20.5

.github/workflows/build-docker-image.yaml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
       - name: Login to GHCR
-        uses: docker/login-action@v3
+        uses: docker/login-action@v2
         if: github.event_name != 'pull_request'
         with:
           registry: ghcr.io

go.mod

@@ -3,6 +3,6 @@ module github.com/jamesog/aaisp-chaos
 go 1.13
 
 require (
-	github.com/prometheus/client_golang v1.14.0
+	github.com/prometheus/client_golang v1.20.5
 	github.com/rs/zerolog v1.27.0
 )