CI: show dependency tracking file at conclusion of community build run

This is the file which tracks projects published during the community
build run, which are injected as dependency overrides into subsequently
built projects. It can be useful to inspect this file when debugging.

.github/workflows/ci.yaml

@@ -232,6 +232,10 @@ jobs:
           git submodule update --init --recursive --jobs 7
           ./project/scripts/sbt "community-build/testOnly dotty.communitybuild.CommunityBuildTestA"
 
+      - name: Show dependency tracking file
+        if: ${{ always() }}
+        run: cat community-build/dotty-community-build-deps || true
+
   community_build_b:
     runs-on: [self-hosted, Linux]
     container:
@@ -275,6 +279,10 @@ jobs:
           git submodule update --init --recursive --jobs 7
           ./project/scripts/sbt "community-build/testOnly dotty.communitybuild.CommunityBuildTestB"
 
+      - name: Show dependency tracking file
+        if: ${{ always() }}
+        run: cat community-build/dotty-community-build-deps || true
+
   community_build_c:
     runs-on: [self-hosted, Linux]
     container:
@@ -318,6 +326,10 @@ jobs:
           git submodule update --init --recursive --jobs 7
           ./project/scripts/sbt "community-build/testOnly dotty.communitybuild.CommunityBuildTestC"
 
+      - name: Show dependency tracking file
+        if: ${{ always() }}
+        run: cat community-build/dotty-community-build-deps || true
+
   community_build_forward_compat:
     runs-on: [self-hosted, Linux]
     container: