Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/iop.yml

@@ -19,7 +19,7 @@ jobs:
       NO_TTY: "1"
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: test findy as Bob with ${{ matrix.their_agent }}
         # TODO: javascript agent behaving badly, enable when problems fixed
         if: ${{ matrix.their_agent != 'javascript' }}

.github/workflows/on-release.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: test
         run: echo "implement e2e/acceptance tests"
 
@@ -19,7 +19,7 @@ jobs:
       packages: write
       contents: read
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
@@ -54,7 +54,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: master
       - name: merge

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
       CI: true
     steps:
       # install indy
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           repository: "findy-network/findy-wrapper-go"
       - name: install indy
@@ -39,7 +39,7 @@ jobs:
       CI: true
     steps:
       # setup von-network ledger
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           repository: "bcgov/von-network"
           ref: "22973513c99cc9a286a6f181ca5c5f354a4eb2ee"
@@ -54,7 +54,7 @@ jobs:
           ./manage start
 
       # install indy
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           repository: "findy-network/findy-wrapper-go"
       - name: install indy
@@ -66,7 +66,7 @@ jobs:
         with:
           go-version-file: "./go.mod"
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # test round for sov-did (default) and indy ledger
       - name: test and measure coverage
@@ -90,7 +90,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # install indy
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           repository: "findy-network/findy-wrapper-go"
       - name: install indy
@@ -100,7 +100,7 @@ jobs:
         with:
           go-version-file: "./go.mod"
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: install cli
         run: |
           curl https://raw.githubusercontent.com/findy-network/findy-agent-cli/HEAD/install.sh > install.sh
@@ -147,7 +147,7 @@ jobs:
     needs: [check, test-default, e2e-full]
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: download coverage file
         uses: actions/download-artifact@v3
         with: