loading fixes: fix pages loaded from wacz files having the wrong timestamp, more efficent loading of wacz files even if HEAD method is not supported (from wabac.js 2.6.6)

docs: embedding: add that relative paths are relative to replayBase
bump to 3.1.12

package.json

@@ -1,7 +1,7 @@
 {
   "name": "replaywebpage",
   "productName": "ReplayWeb.page",
-  "version": "1.3.11",
+  "version": "1.3.12",
   "description": "Serverless Web Archive Replay",
   "repository": "https://github.com/webrecorder/replayweb.page",
   "homepage": "https://replayweb.page/",
@@ -9,7 +9,7 @@
   "license": "AGPL-3.0-or-later",
   "dependencies": {
     "@fortawesome/fontawesome-free": "^5.13.0",
-    "@webrecorder/wabac": "^2.6.5",
+    "@webrecorder/wabac": "^2.6.6",
     "bulma": "^0.9.0",
     "electron-log": "^4.3.0",
     "electron-updater": "^4.3.5",