Version tag to 1.20.0 (cloudnative-pg#1971)

Signed-off-by: Jaime Silvela <jaime.silvela@enterprisedb.com>
Co-authored-by: Jaime Silvela <jaime.silvela@enterprisedb.com>

Author: github-actions[bot]

docs/src/installation_upgrade.md

@@ -7,12 +7,12 @@
 The operator can be installed like any other resource in Kubernetes,
 through a YAML manifest applied via `kubectl`.
 
-You can install the [latest operator manifest](https://raw.githubusercontent.com/cloudnative-pg/cloudnative-pg/release-1.19/releases/cnpg-1.19.1.yaml)
+You can install the [latest operator manifest](https://raw.githubusercontent.com/cloudnative-pg/cloudnative-pg/release-1.20/releases/cnpg-1.20.0.yaml)
 for this minor release as follows:
 
 ```sh
 kubectl apply -f \
-  https://raw.githubusercontent.com/cloudnative-pg/cloudnative-pg/release-1.19/releases/cnpg-1.19.1.yaml
+  https://raw.githubusercontent.com/cloudnative-pg/cloudnative-pg/release-1.20/releases/cnpg-1.20.0.yaml
 ```
 
 You can verify that with:
@@ -64,7 +64,7 @@ this minor release with:
 
 ```sh
 curl -sSfL \
-  https://raw.githubusercontent.com/cloudnative-pg/artifacts/release-1.19/manifests/operator-manifest.yaml | \
+  https://raw.githubusercontent.com/cloudnative-pg/artifacts/release-1.20/manifests/operator-manifest.yaml | \
   kubectl apply -f -
 ```
 

pkg/versions/versions.go

@@ -20,13 +20,13 @@ package versions
 
 const (
 	// Version is the version of the operator
-	Version = "1.19.1"
+	Version = "1.20.0"
 
 	// DefaultImageName is the default image used by the operator to create pods
 	DefaultImageName = "ghcr.io/cloudnative-pg/postgresql:15.2"
 
 	// DefaultOperatorImageName is the default operator image used by the controller in the pods running PostgreSQL
-	DefaultOperatorImageName = "ghcr.io/cloudnative-pg/cloudnative-pg:1.19.1"
+	DefaultOperatorImageName = "ghcr.io/cloudnative-pg/cloudnative-pg:1.20.0"
 )
 
 // BuildInfo is a struct containing all the info about the build
@@ -36,7 +36,7 @@ type BuildInfo struct {
 
 var (
 	// buildVersion injected during the build
-	buildVersion = "1.19.1"
+	buildVersion = "1.20.0"
 
 	// buildCommit injected during the build
 	buildCommit = "none"