Update actions/checkout action to v4

package.json

@@ -14,7 +14,7 @@
     "url": "https://git.sp-codes.de/samuel-p/sp-codes.de"
   },
   "optionalDependencies": {
-    "browser-sync": "^3.0.2"
+    "browser-sync": "^2.29.3"
   },
   "devDependencies": {
     "@11ty/eleventy": "^2.0.1",
@@ -27,7 +27,7 @@
     "eleventy-plugin-rev": "^2.0.0",
     "eleventy-sass": "^2.2.4",
     "glob": "^10.3.10",
-    "minify": "^11.0.1",
+    "minify": "^10.5.2",
     "postcss": "^8.4.32",
     "sass": "^1.69.5",
     "uncss": "^0.17.3"

src/_data/donations.json

@@ -2,13 +2,6 @@
   {
     "year": 2023,
     "donations": [
-      {
-        "date": "27.12.2023",
-        "amount": 50,
-        "via": "banktransfer",
-        "from": null,
-        "first": false
-      },
       {
         "date": "16.11.2023",
         "amount": 25,