Add Dependabot to Galaxy workflow (#359)

Author: alessfg

.github/workflows/galaxy.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   galaxy:
     name: Galaxy
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Check out the codebase
         uses: actions/checkout@v2
@@ -18,7 +18,7 @@ jobs:
           python-version: 3.x
 
       - name: Install Ansible
-        run: pip3 install ansible-base==2.10.3
+        run: pip3 install -r .github/workflows/requirements_galaxy.txt
 
       - name: Import release to Ansible Galaxy
         run: ansible-galaxy role import --api-key ${{ secrets.GALAXY_API_KEY }} $(echo ${{ github.repository }} | cut -d/ -f1) $(echo ${{ github.repository }} | cut -d/ -f2)

.github/workflows/molecule.yml

@@ -14,7 +14,7 @@ on:
 jobs:
   molecule:
     name: Molecule
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         scenario:
@@ -43,7 +43,7 @@ jobs:
 
       - name: Install Molecule dependencies
         if: "!(contains(matrix.scenario, 'plus') && github.event.pull_request.head.repo.full_name != github.repository)"
-        run: pip3 install -r .github/workflows/requirements.txt
+        run: pip3 install -r .github/workflows/requirements_molecule.txt
 
       - name: Run Molecule tests
         if: "!(contains(matrix.scenario, 'plus') && github.event.pull_request.head.repo.full_name != github.repository)"

.github/workflows/requirements_galaxy.txt

@@ -0,0 +1 @@
+ansible-base==2.10.4

.github/workflows/requirements.txt renamed to .github/workflows/requirements_molecule.txt

@@ -9,6 +9,7 @@ Add support for Dependabot.
 ENHANCEMENTS:
 
 *   Only run GitHub actions Galaxy CI/CD workflow when a new release is published.
+*   Specify GitHub actions Ubuntu release.
 *   Update list of supported platforms.
 
 ## 0.19.1 (January 11, 2021)