main.yml: bump actions/checkout to v5

Author: ViktorT-11

.github/workflows/main.yml

@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
 
       - name: go cache
         uses: actions/cache@v3
@@ -68,7 +68,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
@@ -106,7 +106,7 @@ jobs:
           - unit-race
     steps:
       - name: git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
 
       - name: go cache
         uses: actions/cache@v3
@@ -135,7 +135,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
 
       - name: go cache
         uses: actions/cache@v3