Sync the GitHub runner clock with the Windows time server (#404)

Adding a step to workflow jobs that interface Apple servers, as a workaround for build issues caused by runner clocks being out of sync. See https://github.com/actions/runner issue number 2996 for details.

- name: Sync clock
        run: sudo sntp -sS time.windows.com

Added to the following workflows / jobs:
- validate_secrets.yml / validate-fastlane-secrets
- add_identifiers.yml / identifiers
- build_iAPS.yml / build
- create_certs.yml / certificates

.github/workflows/add_identifiers.yml

@@ -29,6 +29,10 @@ jobs:
       - name: Install Project Dependencies
         run: bundle install
 
+      # Sync the GitHub runner clock with the Windows time server (workaround as suggested in https://github.com/actions/runner/issues/2996)
+      - name: Sync clock
+        run: sudo sntp -sS time.windows.com
+
       # Create or update identifiers for app
       - name: Fastlane Provision
         run: bundle exec fastlane identifiers

.github/workflows/build_iAPS.yml

@@ -228,7 +228,11 @@ jobs:
       # Install project dependencies
       - name: Install project dependencies
         run: bundle install
-      
+
+      # Sync the GitHub runner clock with the Windows time server (workaround as suggested in https://github.com/actions/runner/issues/2996)
+      - name: Sync clock
+        run: sudo sntp -sS time.windows.com
+
       # Build signed iAPS IPA file
       - name: Fastlane Build & Archive
         run: bundle exec fastlane build_iAPS        

.github/workflows/create_certs.yml

@@ -30,6 +30,10 @@ jobs:
       - name: Install Project Dependencies
         run: bundle install
 
+      # Sync the GitHub runner clock with the Windows time server (workaround as suggested in https://github.com/actions/runner/issues/2996)
+      - name: Sync clock
+        run: sudo sntp -sS time.windows.com
+
       # Create or update certificates for app
       - name: Create Certificates
         run: bundle exec fastlane certs

.github/workflows/validate_secrets.yml

@@ -129,6 +129,10 @@ jobs:
       - name: Install Project Dependencies
         run: bundle install
 
+      # Sync the GitHub runner clock with the Windows time server (workaround as suggested in https://github.com/actions/runner/issues/2996)
+      - name: Sync clock
+        run: sudo sntp -sS time.windows.com
+
       - name: Validate Fastlane Secrets
         run: |
           # Validate Fastlane Secrets