unify naming (#40)

Author: max-lobur

.github/workflows/feature-branch.yml

@@ -1,4 +1,4 @@
-name: Feature Branch
+name: feature-branch
 on:
   pull_request:
     branches: [ main ]

.github/workflows/main-branch.yml

@@ -1,4 +1,4 @@
-name: Main Branch
+name: main-branch
 on:
   push:
     branches: [ main ]