chore: update repo semaphore task (#538)

Co-authored-by: service-bot-app[bot] <foo-bar+service-bot-app[bot]@users.noreply.github.com>

Author: service-bot-app[bot]

.semaphore/cp_dockerfile_build.yml

@@ -117,7 +117,7 @@ blocks:
     dependencies: ["Validation"]
     run:
       # don't run the tests on non-functional changes...
-      when: "change_in('/', {exclude: ['/.deployed-versions/', '.github/']})"
+      when: "change_in('/', {exclude: ['/.deployed-versions/', '.github/'], default_branch: 'master'})"
     task:
       jobs:
         - name: Build, Test, & Scan ubi9
@@ -177,7 +177,7 @@ blocks:
     dependencies: ["Validation"]
     run:
       # don't run the tests on non-functional changes...
-      when: "change_in('/', {exclude: ['/.deployed-versions/', '.github/']})"
+      when: "change_in('/', {exclude: ['/.deployed-versions/', '.github/'], default_branch: 'master'})"
     task:
       agent:
         machine: