Update GHA OS versions to latest

Signed-off-by: Yuki Okushi <jtitor@2k36.org>

Author: JohnTitor

.github/workflows/rust.yml

@@ -3,7 +3,7 @@ name: Continuous integration
 on:
   pull_request:
   push:
-      branches:
+    branches:
       - master
 
 jobs:
@@ -18,10 +18,10 @@ jobs:
         - nightly
         - 1.23.0
         os:
-        - macos-10.15
-        - windows-2019
-        - ubuntu-20.04
-  
+        - macos-12
+        - windows-2022
+        - ubuntu-22.04
+
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3