ci: set PR-suffix on PRs against non-main/release branches (#471)

* set PR suffix on PRs against release branches

* added comment

* Update template/.github/workflows/build.yml.j2

Co-authored-by: Nick <10092581+NickLarsenNZ@users.noreply.github.com>

* Update template/.github/workflows/build.yml.j2

Co-authored-by: Nick <10092581+NickLarsenNZ@users.noreply.github.com>

---------

Co-authored-by: Nick <10092581+NickLarsenNZ@users.noreply.github.com>

Author: adwk67

template/.github/workflows/build.yml.j2

@@ -344,10 +344,18 @@ jobs:
         with:
           crate: cargo-edit
           bin: cargo-set-version
-      - name: Update version if PR
-        # For PRs to be merged against a release branch, the version has already been set, in which case ignore this step.
+      - name: Update version if PR against main branch
         if: ${{ github.event_name == 'pull_request' && github.ref == 'refs/heads/main' }}
         run: cargo set-version --offline --workspace 0.0.0-pr${{ github.event.pull_request.number }}
+      - name: Update version if PR against non-main branch
+        # For PRs to be merged against a release branch, use the version that has already been set in the calling script.
+        if: ${{ github.event_name == 'pull_request' && github.ref != 'refs/heads/main' }}
+        env:
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+        run: |
+          MANIFEST_VERSION=$(cargo metadata --format-version 1 --no-deps | jq -r '.packages[0].version')
+          PR_VERSION="${MANIFEST_VERSION}-pr${PR_NUMBER}"
+          cargo set-version --offline --workspace "$PR_VERSION"
 
       # Recreate charts and publish charts and docker image. The "-e" is needed as we want to override the
       # default value in the makefile if called from this action, but not otherwise (i.e. when called locally).
@@ -411,10 +419,18 @@ jobs:
         with:
           crate: cargo-edit
           bin: cargo-set-version
-      - name: Update version if PR
-        # For PRs to be merged against a release branch, the version has already been set, in which case ignore this step.
+      - name: Update version if PR against main branch
         if: ${{ github.event_name == 'pull_request' && github.ref == 'refs/heads/main' }}
         run: cargo set-version --offline --workspace 0.0.0-pr${{ github.event.pull_request.number }}
+      - name: Update version if PR against non-main branch
+        # For PRs to be merged against a release branch, use the version that has already been set in the calling script.
+        if: ${{ github.event_name == 'pull_request' && github.ref != 'refs/heads/main' }}
+        env:
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+        run: |
+          MANIFEST_VERSION=$(cargo metadata --format-version 1 --no-deps | jq -r '.packages[0].version')
+          PR_VERSION="${MANIFEST_VERSION}-pr${PR_NUMBER}"
+          cargo set-version --offline --workspace "$PR_VERSION"
       - name: Build manifest list
         run: |
           # Creating manifest list