fix: update branch references from master to main in workflow files

Author: SheepFromHeaven

.github/workflows/deploy.yml

@@ -4,7 +4,7 @@ name: Deploy static content to Pages
 on:
   # Runs on pushes targeting the default branch
   push:
-    branches: ['master']
+    branches: ['main']
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:

.github/workflows/playwright.yml

@@ -1,7 +1,7 @@
 name: Playwright Tests
 on:
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
 jobs:
   test:
     timeout-minutes: 60

.github/workflows/unit-tests.yml

@@ -1,7 +1,7 @@
 name: Unit Tests
 on:
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
 jobs:
   test:
     timeout-minutes: 60

public/modules/ui/general.js

@@ -548,7 +548,7 @@ function showInfo() {
 
     <ul style="columns:2">
       <li>${link("https://github.com/Azgaar/Fantasy-Map-Generator", "GitHub repository")}</li>
-      <li>${link("https://github.com/Azgaar/Fantasy-Map-Generator/blob/master/LICENSE", "License")}</li>
+      <li>${link("https://github.com/Azgaar/Fantasy-Map-Generator/blob/main/LICENSE", "License")}</li>
       <li>${link("https://github.com/Azgaar/Fantasy-Map-Generator/wiki/Changelog", "Changelog")}</li>
       <li>${link("https://github.com/Azgaar/Fantasy-Map-Generator/wiki/Hotkeys", "Hotkeys")}</li>
       <li>${link("https://trello.com/b/7x832DG4/fantasy-map-generator", "Devboard")}</li>