Run Spring update workflows from main ref

Author: rujche

.github/workflows/test-spring-boot-rc-version.yml

@@ -14,6 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
+          ref: main
           fetch-depth: 0
       - name: Generate Version File
         run: |

.github/workflows/update-spring-cloud-azure-support-file.yml

@@ -20,6 +20,8 @@ jobs:
       has_open_pr: ${{ steps.check.outputs.has_open_pr }}
     steps:
       - uses: actions/checkout@v4
+        with:
+          ref: main
       - name: Check for Existing Open Pull Request
         id: check
         uses: actions/github-script@v7
@@ -44,6 +46,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
+          ref: main
           fetch-depth: 0
       - name: Generate Spring Cloud Azure Support File
         run: |

.github/workflows/update-spring-dependencies.yml

@@ -20,6 +20,8 @@ jobs:
       skip_pipeline: ${{ steps.check_prs.outputs.skip_pipeline }}
     steps:
       - uses: actions/checkout@v4
+        with:
+          ref: main
       - name: Check for Open Spring Boot Upgrade PRs
         id: check_prs
         uses: actions/github-script@v7
@@ -44,6 +46,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
+          ref: main
           fetch-depth: 0
       - name: Generate Version File
         run: |