chore(ci): tweak names of jobs etc

.github/workflows/build-38.yml

@@ -1,4 +1,4 @@
-name: ublue main 38
+name: bluefin 38
 on:
   merge_group:
   pull_request:

.github/workflows/build-39.yml

@@ -1,4 +1,4 @@
-name: ublue main 39
+name: bluefin 39
 on:
   merge_group:
   pull_request:

.github/workflows/build-40.yml

@@ -1,4 +1,4 @@
-name: ublue main 40
+name: bluefin 40
 on:
   merge_group:
   pull_request:

.github/workflows/reusable-build.yml

@@ -10,12 +10,12 @@ env:
     IMAGE_REGISTRY: ghcr.io/${{ github.repository_owner }}
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}-${{ inputs.fedora_version }}
   cancel-in-progress: true
 
 jobs:
   build-container:
-    name: build
+    name: image
     runs-on: ubuntu-latest
     continue-on-error: false
     strategy:
@@ -270,7 +270,7 @@ jobs:
         run: exit 0
 
   build_iso:
-    name: build iso
+    name: iso
     needs: [check]
     if: github.ref_name == 'testing'
     # Eventually would be nice for building images in PRs