Modernize GitHub Actions in coverage and spec_update workflows

Bump the action versions in coverage.yml and spec_update.yml to match
the versions already standardized in ci.yml and pypiupload.yml, and to
current major releases:

- actions/checkout: v2/v3 -> v5
- actions/setup-python: v3.1.4/v4 -> v6
- codecov/codecov-action: v3.1.6 -> v5
- peter-evans/create-pull-request: v5.0.0 -> v7

This supersedes the stale dependabot PRs #422, #471, #473, and #478,
which targeted long-outdated versions and had merge conflicts.

Author: AndreyVMarkelov

.github/workflows/coverage.yml

@@ -11,9 +11,9 @@ jobs:
   Coverage:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
       - name: Setup Python environment
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: '3.11'
       - name: Setup virtual environment
@@ -33,17 +33,17 @@ jobs:
           coverage run --rcfile=.coveragerc -m pytest test/unit/test_dropbox_unit.py
           coverage xml
       - name: Publish Coverage
-        uses: codecov/codecov-action@v3.1.6
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           flags: unit
           fail_ci_if_error: true
   IntegrationCoverage:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v5
       - name: Setup Python environment
-        uses: actions/setup-python@v3.1.4
+        uses: actions/setup-python@v6
         with:
           python-version: '3.11'
       - name: Setup virtual environment
@@ -77,7 +77,7 @@ jobs:
           coverage run --rcfile=.coveragerc -m pytest test/integration/test_dropbox.py
           coverage xml
       - name: Publish Coverage
-        uses: codecov/codecov-action@v3.1.6
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           flags: integration

.github/workflows/spec_update.yml

@@ -8,9 +8,9 @@ jobs:
   Update:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
       - name: Setup Python environment
-        uses: actions/setup-python@v3.1.4
+        uses: actions/setup-python@v6
         with:
           python-version: '3.11'
       - name: Get current time
@@ -51,7 +51,7 @@ jobs:
           pip install -r requirements.txt
           python generate_base_client.py
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v5.0.0
+        uses: peter-evans/create-pull-request@v7
         if: steps.git-diff-num.outputs.num-diff != 0
         with:
           token: ${{ secrets.SPEC_UPDATE_TOKEN }}