Bump actions/checkout from 2 to 3

.github/workflows/coverity-scan.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: "recursive"
 

.github/workflows/docker.yml

@@ -25,7 +25,7 @@ jobs:
       TEST_TAG: zeek:latest
       CONFFLAGS: --generator=Ninja --build-type=Release --enable-zeek-client
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: "recursive"
 
@@ -119,7 +119,7 @@ jobs:
       # Grab the sources so we have access to btest. Could also use pip, but it
       # seems appealing to be using the in-tree version of btest. btest is in a
       # submodule; we check it out selectively to save time.
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Check out btest
         run: git submodule update --init ./auxil/btest
 
@@ -141,7 +141,7 @@ jobs:
           echo "TESTSUITE_COMMIT=$(cat ./testing/external/commit-hash.zeek-testing-cluster)" >> $GITHUB_ENV
 
       - name: Retrieve cluster testsuite
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           repository: zeek/zeek-testing-cluster
           path: testing/external/zeek-testing-cluster

.github/workflows/generate-docs.yml

@@ -19,12 +19,12 @@ jobs:
       # event, so we only need to authenticate in that case. Use
       # unauthenticated access otherwise so this action can e.g., also run from
       # clones.
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         if: github.event_name == 'schedule'
         with:
           submodules: "recursive"
           token: ${{ secrets.ZEEK_BOT_TOKEN }}
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         if: github.event_name != 'schedule'
         with:
           submodules: "recursive"

.github/workflows/pre-commit.yml

@@ -9,6 +9,6 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - uses: actions/setup-python@v2
     - uses: pre-commit/action@v2.0.3