Update GitHub Actions

The remote repository `origin` needs to be fetched explictly
with actions/checkout@v2 and later. This was not the case
with actions/checkout@v1.

.github/workflows/bench_pr.yml

@@ -8,13 +8,13 @@ jobs:
       GOBIN: /home/runner/go
     steps:
     - name: Set up Go 1.22
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v5
       with:
         go-version: 1.22
       id: go
 
     - name: Check out code 
-      uses: actions/checkout@v1
+      uses: actions/checkout@v4
 
     - name: Get dependencies
       run: | 
@@ -27,7 +27,7 @@ jobs:
        git log -1 --format="%H"
        go test -bench=. -benchmem -benchtime=10x -count=7 > $HOME/new.txt
        git reset --hard HEAD
-       git checkout $GITHUB_BASE_REF
+       git pull origin $GITHUB_BASE_REF
        echo "Base Commit:"
        git log -1 --format="%H"
        go test -bench=. -benchmem -benchtime=10x -count=7 > $HOME/old.txt

.github/workflows/bench_push.yml

@@ -8,13 +8,13 @@ jobs:
       GOBIN: /home/runner/go
     steps:
     - name: Set up Go 1.22
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v5
       with:
         go-version: 1.22
       id: go
 
     - name: Check out code 
-      uses: actions/checkout@v1
+      uses: actions/checkout@v4
 
     - name: Get dependencies
       run: | 

.github/workflows/go.yml

@@ -8,13 +8,13 @@ jobs:
     steps:
 
     - name: Set up Go 1.22
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v5
       with:
         go-version: 1.22
       id: go
 
     - name: Check out code 
-      uses: actions/checkout@v1
+      uses: actions/checkout@v4
 
     - name: Get dependencies
       run: |