revert to ubuntu latest

Author: refcell

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on: [push]
 jobs:
   tests:
     name: Forge Testing
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
         with:
@@ -19,7 +19,7 @@ jobs:
         run: forge test
 
   snapshot:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
         with:
@@ -35,7 +35,7 @@ jobs:
         run: forge snapshot --check
 
   slither:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
         with:
@@ -58,7 +58,7 @@ jobs:
     strategy:
       fail-fast: true
     name: Run Unix Scripts
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
         with: