Use longer timeframe

.github/workflows/pr-validation.yml

@@ -41,15 +41,19 @@ jobs:
             sha='${{ github.sha }}'
           fi
 
-          # Sometimes go get will fail initially, so we retry it up to 5 times before giving up
+          # Give GitHub some time to make the commit available
+          sleep 10
+
+          # Sometimes it can take https://proxy.golang.org up to a minute for the latest commit to be available.
+          # See the FAQ at https://proxy.golang.org/
           FAILED=1
           for i in {1..5}; do
             if go get "$repo/v2@$sha" ; then
               FAILED=0
               break
             fi
-            echo "Failed to 'go get' $repo/v2@$sha, retrying in 10 seconds…"
-            sleep 10
+            echo "Failed to 'go get' $repo/v2@$sha, retrying in 60 seconds…"
+            sleep 60
           done
 
           exit $FAILED