Restrict trigger push branch for GitHub Workflow

[apupier]

What is the purpose of the change

Feature branches rarely need their own CI runs: the code is already tested when a pull request is opened against a release branch. If the push trigger has no branch restriction and pull_request is also configured, every push to a branch with an open PR runs the workflow twice: once for the push and once for the PR synchronisation.

Always give the push trigger an explicit list of branches: this stops branches created from a release branch from inheriting its workflow runs.

see https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=430408443#GitHubActionsRecommendedPractices-Restrictthepushtriggertospecificbranches

Related issues/PRs

Brief change log

Checklist

• I have read the Contributing Guidelines on pull requests.
• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the Linkis mailing list first)
• If this is a code change: I have written unit tests to fully verify the new behavior.

[apupier]

all the failures are unrelated to my changes:

[07105](https://github.com/apache/linkis/actions/runs/28510646714/job/84509860685?pr=5451#step:5:107106)
Error:  Failed to execute goal on project linkis-dist: Could not resolve dependencies for project org.apache.linkis:linkis-dist:pom:1.9.0-spark3: The following artifacts could not be resolved: org.apache.hadoop:hadoop-hdfs-client:jar:2.7.2 (absent): Could not find artifact org.apache.hadoop:hadoop-hdfs-client:jar:2.7.2 in central (https://repo.maven.apache.org/maven2) -> [Help 1]

2026-07-01T10:39:11.0062869Z [ERROR] Failed to execute goal on project linkis-dist: Could not resolve dependencies for project org.apache.linkis:linkis-dist:pom:1.9.0: The following artifacts could not be resolved: org.apache.hadoop:hadoop-hdfs-client:jar:2.7.2 (absent): Could not find artifact org.apache.hadoop:hadoop-hdfs-client:jar:2.7.2 in central (https://repo.maven.apache.org/maven2) -> [Help 1]

Error:  Failed to execute goal com.diffplug.spotless:spotless-maven-plugin:2.24.1:check (default-cli) on project linkis-eureka: The following files had format violations:
Error:      src/main/java/org/apache/linkis/eureka/EurekaSecurityConfig.java
Error:          @@ -17,14 +17,15 @@
Error:           
Error:           package·org.apache.linkis.eureka;
Error:           
Error:          -import·org.slf4j.Logger;
Error:          -import·org.slf4j.LoggerFactory;
Error:           import·org.springframework.beans.factory.annotation.Value;
Error:           import·org.springframework.context.annotation.Bean;
Error:           import·org.springframework.context.annotation.Configuration;
Error:           import·org.springframework.security.config.annotation.web.builders.HttpSecurity;
Error:           import·org.springframework.security.web.SecurityFilterChain;
Error:           
Error:          +import·org.slf4j.Logger;
Error:          +import·org.slf4j.LoggerFactory;
Error:          +
Error:           @Configuration
Error:           public·class·EurekaSecurityConfig·{
Error:           
Error:  Run 'mvn spotless:apply' to fix these violations.

ERROR 1136 (21S01) at line 670 in file: './linkis-dist/package/db/linkis_dml.sql': Column count doesn't match value count at row 11