ci: update Process-PSModule to v6.1.2

The Import-TestData plumbing and always-evaluate-version-labels fix are now released in Process-PSModule v6.1.2 (via PSModule/Process-PSModule#377, IPH v1.0.9 + Resolve-PSModuleVersion v1.1.4), so the temporary feat/import-testdata branch ref is replaced with the released tag.

Author: MariusStorhaug

.github/workflows/Process-PSModule.yml

@@ -27,7 +27,7 @@ permissions:
 
 jobs:
   Process-PSModule:
-    uses: PSModule/Process-PSModule/.github/workflows/workflow.yml@feat/import-testdata # E2E: temporary branch ref for the Import-TestData test
+    uses: PSModule/Process-PSModule/.github/workflows/workflow.yml@v6.1.2
     secrets:
       APIKey: ${{ secrets.APIKey }}
       # E2E: push a secret (masked in logs) and a variable (not masked) into the module test jobs.