OZG-7324 adjust JenkinsFile

Jenkinsfile

@@ -142,7 +142,7 @@ tools { go 'go-1.22.0' }
 
                     tagAndPushDockerImage('fachstellen-proxy', IMAGE_TAG)
 
-                    if (env.BRANCH_NAME == 'master') {
+                    if (isMainBranch()) {
                         tagAndPushDockerImage('fachstellen-proxy', 'snapshot-latest')
                     }
                     else if (env.BRANCH_NAME == 'release') {
@@ -173,7 +173,7 @@ tools { go 'go-1.22.0' }
 
         stage('Trigger Dev rollout') {
             when {
-                branch 'master'
+                branch 'main'
             }
             steps {
                 script {
@@ -228,8 +228,8 @@ String getHelmRepository(){
 }
 
 String getBuildProfile() {
-    if (isMasterBranch()) {
-        return "-P master"
+    if (isMainBranch()) {
+        return "-P main"
     } else if (isReleaseBranch()) {
         return "-P release"
     } else {
@@ -333,8 +333,8 @@ Boolean hasFachstellenProxyValuesFileChanged(String environment) {
     return sh (script: "git status | grep '${environment}/application/values/fachstellen-proxy-values.yaml'", returnStatus: true) == env.SH_SUCCESS_STATUS_CODE as Integer
 }
 
-Boolean isMasterBranch() {
-    return env.BRANCH_NAME == 'master'
+Boolean isMainBranch() {
+    return env.BRANCH_NAME == 'main'
 }
 
 Boolean isReleaseBranch() {