cant use variables in stage labels.

https://stackoverflow.com/questions/64021328/expected-string-literal-in-condition-express-in-jenkins-pipeline

build-alpine-glibc.jenkins

@@ -118,7 +118,7 @@ RUN apk add --update --no-cache --virtual=.build-dependencies \\
             }
         }
 
-        stage ('Build & Push (v' + staticVersion + ')') {
+        stage ('Build & Push (Static Version)') {
             steps {
                 container ('kaniko') {
                     script {