Add yq to post-operator release jobs (#691)

Signed-off-by: Mykhailo Kuznietsov <mkuznets@redhat.com>

.github/workflows/release-che-docs.yml

@@ -25,6 +25,14 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0
+      - name: Set up Python 3.6
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.6
+      - name: Install yq
+        run: |
+          python -m pip install --upgrade pip
+          pip install yq
       - name: Release che docs PRs
         run: |
           hub version

.github/workflows/release-chectl.yml

@@ -25,6 +25,14 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0
+      - name: Set up Python 3.6
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.6
+      - name: Install yq
+        run: |
+          python -m pip install --upgrade pip
+          pip install yq
       - name: Release chectl PRs
         run: |
           hub version