build(deps): bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/deploy-auth-service.yml

@@ -57,7 +57,7 @@ jobs:
           working-directory: ./src/Biotrackr.Auth.Svc/Biotrackr.Auth.Svc.IntegrationTests
       steps:
         - name: Checkout Repository code
-          uses: actions/checkout@v5
+          uses: actions/checkout@v6
 
         - name: Setup .NET ${{ needs.env-setup.outputs.dotnet-version }}
           uses: actions/setup-dotnet@v5

.github/workflows/template-aca-api-integration-tests.yml

@@ -39,7 +39,7 @@ jobs:
 
         steps:
             - name: Checkout Repository code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - uses: azure/login@v2
               name: Login to Azure

.github/workflows/template-acr-push-image.yml

@@ -30,7 +30,7 @@ jobs:
           working-directory: ${{ inputs.working-directory }}
       steps:
         - name: Checkout code
-          uses: actions/checkout@v5
+          uses: actions/checkout@v6
 
         - name: Azure login
           uses: azure/login@v2

.github/workflows/template-bicep-deploy.yml

@@ -44,7 +44,7 @@ jobs:
         runs-on: ubuntu-latest
         environment: ${{ inputs.environment }}
         steps:
-        - uses: actions/checkout@v5
+        - uses: actions/checkout@v6
           name: Checkout Repository Code
 
         - uses: azure/login@v2

.github/workflows/template-bicep-linter.yml

@@ -12,7 +12,7 @@ jobs:
         name: Lint Bicep Template
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
               name: Checkout Repository Code
 
             - name: Run Bicep Linter

.github/workflows/template-bicep-validate.yml

@@ -40,7 +40,7 @@ jobs:
         name: Validate Bicep Template
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
               name: Checkout Repository Code
 
             - uses: azure/login@v2

.github/workflows/template-bicep-whatif.yml

@@ -40,7 +40,7 @@ jobs:
         name: Preview Bicep Template Deployment
         runs-on: ubuntu-latest
         steps:
-        - uses: actions/checkout@v5
+        - uses: actions/checkout@v6
           name: Checkout Repository Code
 
         - uses: azure/login@v2

.github/workflows/template-dotnet-run-contract-tests.yml

@@ -26,7 +26,7 @@ jobs:
                 working-directory: ${{ inputs.working-directory }}
         steps:
             - name: Checkout Repository code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - name: Setup .NET ${{ inputs.dotnet-version }}
               uses: actions/setup-dotnet@v5

.github/workflows/template-dotnet-run-e2e-tests.yml

@@ -53,7 +53,7 @@ jobs:
 
         steps:
             - name: Checkout Repository code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - name: Setup .NET ${{ inputs.dotnet-version }}
               uses: actions/setup-dotnet@v5

.github/workflows/template-dotnet-run-unit-tests.yml

@@ -36,7 +36,7 @@ jobs:
                 working-directory: ${{ inputs.working-directory }}
         steps:
             - name: Checkout Repository code
-              uses: actions/checkout@v5
+              uses: actions/checkout@v6
 
             - name: Setup .NET ${{ inputs.dotnet-version }}
               uses: actions/setup-dotnet@v5