chore: update GitHub Actions to use Ubuntu 22.04 with dotnet v6

Author: Meir017

.github/workflows/benchmark.yml

@@ -8,7 +8,7 @@ permissions:
 jobs:
   benchmark:
     name: Performance regression check
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     if: github.repository == 'fluentassertions/fluentassertions.analyzers'
     steps:
       - uses: actions/checkout@v4

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-22.04, windows-2022, macos-14]
         config: [Debug, Release]
     runs-on: ${{ matrix.os }}
     env:

.github/workflows/integration.yml

@@ -10,7 +10,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-22.04, windows-2022, macos-14]
     runs-on: ${{ matrix.os }}
     env:
       NUGET_CERT_REVOCATION_MODE: offline

.github/workflows/release.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   publish:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v4