Allow 1.9.latest release workflow to point to 1.9.latest dependency w…

…orkflows (#1177)

* allow 1.9.latest release workflow to point to 1.9.latest dependency workflows
* pin runner version for unit tests to avoid pyodbc build error

.github/workflows/release-prep.yml

@@ -442,7 +442,7 @@ jobs:
   run-unit-tests:
     name: unit test / python ${{ matrix.python-version }}
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     timeout-minutes: 10
 
     strategy:

.github/workflows/release.yml

@@ -94,7 +94,7 @@ jobs:
   # so that the integration tests stage will be skipped.
   audit-version-and-changelog:
     name: "Bump package version, Generate changelog"
-    uses: dbt-labs/dbt-spark/.github/workflows/release-prep.yml@main
+    uses: ./.github/workflows/release-prep.yml
     with:
       sha: ${{ inputs.sha }}
       version_number: ${{ inputs.version_number }}