Downgrade and temporarily pin RxJS to 7.2.0 because of weird errors

Author: squidfunk

material/.icons/octicons/duplicate-16.svg renamed to material/.icons/octicons/copy-16.svg

@@ -55,7 +55,7 @@ theme:
     # - header.autohide
     # - navigation.expand
     # - navigation.indexes
-    # - navigation.instant
+    - navigation.instant
     - navigation.sections
     - navigation.tabs
     # - navigation.tabs.sticky

material/.icons/octicons/duplicate-24.svg renamed to material/.icons/octicons/copy-24.svg

@@ -42,7 +42,7 @@
     "fuzzaldrin-plus": "^0.6.0",
     "lunr": "^2.3.9",
     "lunr-languages": "^1.8.0",
-    "rxjs": "^7.3.0"
+    "rxjs": "7.2.0"
   },
   "devDependencies": {
     "@fortawesome/fontawesome-free": "^5.15.3",