clarify simulated patch version upgrade docs

.github/workflows/e2e-upgrade.yml

@@ -40,7 +40,7 @@ on:
         type: string
         required: false
       toMicroservices:
-        description: Microservice version to target for the upgrade, empty for upgrade target's default version.
+        description: Microservice version to target for the upgrade, empty for upgrade target's default version. If simulating a patch upgrade, you must set this value because the default will not be the simulated version.
         type: string
         required: false
       simulatedTargetVersion:

dev-docs/workflows/e2e-github-config.md → dev-docs/workflows/e2e-upgrade-config.md

@@ -1,6 +1,9 @@
-## [E2E upgrade test]((https://github.com/edgelesssys/constellation/actions/workflows/e2e-upgrade.yml)
+## [E2E upgrade test]((<https://github.com/edgelesssys/constellation/actions/workflows/e2e-upgrade.yml>)
+
 Make sure to set the correct parameters to avoid late failures:
+
 - it's easiest to use the latest CLI version, because then you can omit all other fields. This works because the devbuild is tagged with the next release version and hence is compatible.
 - if using an older CLI version:
   - the last field about simulating a patch-upgrade must have a minor version that is smaller by one compared to the next release
   - the image version must match the patch field version
+  - the service version must match the patch field version

e2e/provider-upgrade/upgrade_test.go

@@ -25,7 +25,7 @@ import (
 var (
 	targetImage         = flag.String("target-image", "", "Image (shortversion) to upgrade to.")
 	targetKubernetes    = flag.String("target-kubernetes", "", "Kubernetes version (MAJOR.MINOR.PATCH) to upgrade to. Defaults to default version of target CLI.")
-	targetMicroservices = flag.String("target-microservices", "", "Microservice version (MAJOR.MINOR.PATCH) to upgrade to. Defaults to default version of target CLI.")
+	targetMicroservices = flag.String("target-microservices", "", "Microservice version (MAJOR.MINOR.PATCH) to upgrade to. Defaults to the pre version of the next release. You must set this value when simulating a patch upgrade.")
 	// When executing the test as a bazel target the CLI path is supplied through an env variable that bazel sets.
 	// When executing via `go test` extra care should be taken that the supplied CLI is built on the same commit as this test.
 	// When executing the test as a bazel target the workspace path is supplied through an env variable that bazel sets.