Fix Gitea workflow: change trigger from main to master branch

.gitea/workflows/docker-build-push.yml

@@ -3,7 +3,7 @@ name: Build and Push Docker Image (Gitea)
 on:
   push:
     branches:
-      - main
+      - master
   workflow_dispatch:
     inputs:
       tag_suffix:
@@ -40,8 +40,8 @@ jobs:
         echo "branch=${GITHUB_REF#refs/heads/}" >> $GITHUB_OUTPUT
         echo "timestamp=$(date +%Y%m%d-%H%M%S)" >> $GITHUB_OUTPUT
         
-        # Set tag suffix: -dev for main branch pushes, or use input for manual triggers
-        if [ "${{ github.event_name }}" = "push" ] && [ "${GITHUB_REF#refs/heads/}" = "main" ]; then
+        # Set tag suffix: -dev for master branch pushes, or use input for manual triggers
+        if [ "${{ github.event_name }}" = "push" ] && [ "${GITHUB_REF#refs/heads/}" = "master" ]; then
           echo "tag_suffix=-dev" >> $GITHUB_OUTPUT
         else
           echo "tag_suffix=${{ inputs.tag_suffix }}" >> $GITHUB_OUTPUT