Refactor linting GHAs

Combine linting GitHub Actions into a single Workflow.

Minor updates to reflect refactoring in other repos.

Signed-off-by: Daniel Farrell <dfarrell@redhat.com>

.github/workflows/dco-check.yml

@@ -1,17 +0,0 @@
-name: DCO Check
-on: pull_request
-
-jobs:
-  dco:
-    runs-on: ubuntu-latest
-    name: DCO Check
-    steps:
-    - name: Get PR Commits
-      id: 'get-pr-commits'
-      uses: tim-actions/get-pr-commits@master
-      with:
-        token: ${{ secrets.GITHUB_TOKEN }}
-    - name: DCO Check
-      uses: tim-actions/dco@master
-      with:
-        commits: ${{ steps.get-pr-commits.outputs.commits }}

.github/workflows/linting.yml

@@ -0,0 +1,33 @@
+---
+name: Linting
+
+on:
+  pull_request:
+
+jobs:
+  dco:
+    name: DCO in Commit Message(s)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get PR commits
+        id: 'get-pr-commits'
+        uses: tim-actions/get-pr-commits@master
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Run DCO check
+        uses: tim-actions/dco@master
+        with:
+          commits: ${{ steps.get-pr-commits.outputs.commits }}
+
+  markdown-link-check:
+    name: Markdown Links (modified files)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2
+
+      - name: Run markdown-link-check
+        uses: gaurav-nelson/github-action-markdown-link-check@v1
+        with:
+          config-file: ".markdownlinkcheck.json"
+          check-modified-files-only: "yes"

.github/workflows/md-links.yml

@@ -1,16 +0,0 @@
-name: Markdown Link Checks
-on: pull_request
-
-jobs:
-  markdown-link-check:
-    runs-on: ubuntu-latest
-    name: Markdown Link Checks
-    steps:
-    - name: Check out code
-      uses: actions/checkout@v1
-
-    - name: Run markdown-link-check
-      uses: gaurav-nelson/github-action-markdown-link-check@v1
-      with:
-        config-file: ".markdownlinkcheck.json"
-        check-modified-files-only: "yes"