Prevent CI workflows from running on forks (#636)

diff --git a/.github/workflows/automatic-sync-main.yml b/.github/workflows/automatic-sync-main.yml
index 1cfaa3e..5d0be91 100644
--- a/.github/workflows/automatic-sync-main.yml
+++ b/.github/workflows/automatic-sync-main.yml
@@ -24,6 +24,7 @@
 jobs:
   build:
     name: Sync Camel Spring Boot Main Branch
+    if: github.repository == 'apache/camel-spring-boot'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Camel project
diff --git a/.github/workflows/depsreview.yaml b/.github/workflows/depsreview.yaml
index a25de59..1fad255 100644
--- a/.github/workflows/depsreview.yaml
+++ b/.github/workflows/depsreview.yaml
@@ -6,6 +6,7 @@
 
 jobs:
   dependency-review:
+    if: github.repository == 'apache/camel-spring-boot'
     runs-on: ubuntu-latest
     steps:
       - name: 'Checkout Repository'
diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index 95a01cf..701f57e 100644
--- a/.github/workflows/pr-build.yml
+++ b/.github/workflows/pr-build.yml
@@ -29,6 +29,7 @@
 
 jobs:
   build:
+    if: github.repository == 'apache/camel-spring-boot'
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3