refer to build-tools image hosted on ghcr.io (#1779)

Signed-off-by: Zbynek Roubalik <zroubali@redhat.com>

.github/workflows/fossa.yml

@@ -9,7 +9,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     # build-tools is built from ../../tools/build-tools.Dockerfile
-    container: kedacore/build-tools:main
+    container: ghcr.io/kedacore/build-tools:main
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-go@v2

.github/workflows/main-build.yml

@@ -8,7 +8,7 @@ jobs:
     name: Validate
     runs-on: ubuntu-latest
     # build-tools is built from ../../tools/build-tools.Dockerfile
-    container: kedacore/build-tools:main
+    container: ghcr.io/kedacore/build-tools:main
     steps:
       - name: Check out code
         uses: actions/checkout@v1

.github/workflows/nightly-e2e.yml

@@ -7,7 +7,7 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     # build-tools is built from ../../tools/build-tools.Dockerfile
-    container: kedacore/build-tools:main
+    container: ghcr.io/kedacore/build-tools:main
     steps:
       - name: Check out code
         uses: actions/checkout@v1

.github/workflows/pr-validation.yml

@@ -8,7 +8,7 @@ jobs:
     name: Validate PR
     runs-on: ubuntu-latest
     # build-tools is built from ../../tools/build-tools.Dockerfile
-    container: kedacore/build-tools:main
+    container: ghcr.io/kedacore/build-tools:main
     steps:
       - name: Check out code
         uses: actions/checkout@v1

.github/workflows/release-build.yml

@@ -8,7 +8,7 @@ jobs:
     name: Push Release
     runs-on: ubuntu-latest
     # build-tools is built from ../../tools/build-tools.Dockerfile
-    container: kedacore/build-tools:main
+    container: ghcr.io/kedacore/build-tools:main
     steps:
       - name: Check out code
         uses: actions/checkout@v1