Fix Docker image tag format - remove duplicate repository name

The github.repository variable already contains the full path
(RedBalloon-work/postgres-flex), so we don't need to append
/postgres-flex again.

Fixed tags:
- ghcr.io/redballoon-work/postgres-flex:15-latest
Instead of:
- ghcr.io/redballoon-work/postgres-flex/postgres-flex:15-latest

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: jcrapuchettes

.github/workflows/ci.yaml

@@ -46,12 +46,12 @@ jobs:
           file: ./pg${{ matrix.pg_version.major }}/Dockerfile
           push: true
           tags: |
-            ghcr.io/${{ github.repository }}/postgres-flex:${{ matrix.pg_version.major }}
-            ghcr.io/${{ github.repository }}/postgres-flex:${{ matrix.pg_version.full }}
-            ghcr.io/${{ github.repository }}/postgres-flex:${{ steps.tag.outputs.TAG }}-${{ matrix.pg_version.major }}
+            ghcr.io/${{ github.repository }}:${{ matrix.pg_version.major }}
+            ghcr.io/${{ github.repository }}:${{ matrix.pg_version.full }}
+            ghcr.io/${{ github.repository }}:${{ steps.tag.outputs.TAG }}-${{ matrix.pg_version.major }}
           build-args: |
             PG_VERSION=${{ matrix.pg_version.full }}
-            PG_MAJOR_VERSION=${{ matrix.pg_version.major }}
+            PG_MAJOR_VERSION=${{ matrix.pg_version.full }}
             VERSION=${{ steps.tag.outputs.TAG }}
           cache-from: type=gha
           cache-to: type=gha,mode=max

.github/workflows/push.yml

@@ -111,7 +111,7 @@ jobs:
           context: .
           file: ./pg${{ matrix.pg_version.major }}/Dockerfile
           push: true
-          tags: ghcr.io/${{ github.repository }}/postgres-flex:${{ matrix.pg_version.major }}-latest
+          tags: ghcr.io/${{ github.repository }}:${{ matrix.pg_version.major }}-latest
           build-args: |
             PG_VERSION=${{ matrix.pg_version.full }}
             PG_MAJOR_VERSION=${{ matrix.pg_version.major }}