Update workflows to use Ubuntu 22.04 and adjust packaging pipeline container

Author: lithorus

.github/workflows/docs.yml

@@ -26,7 +26,7 @@ concurrency:
 jobs:
   # Build job
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -67,7 +67,7 @@ jobs:
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: build
     if: github.ref == 'refs/heads/master' || github.ref == 'refs/heads/main'
     steps:

.github/workflows/packaging-pipeline.yml

@@ -9,7 +9,7 @@ jobs:
   build_opencue_packages:
     name: Build Python Packages
     runs-on: ubuntu-22.04
-    container: python:3.8
+    container: python:3.7
     outputs:
       opencue_proto_path: ${{ steps.package_outputs.outputs.opencue_proto_path }}
       opencue_pycue_path: ${{ steps.package_outputs.outputs.opencue_pycue_path }}