Increase git post buffer and add retry logic for feeds update in OpenWrt jobs

Author: yinheli

.github/workflows/Release.yml

@@ -378,7 +378,8 @@ jobs:
           cat feeds.conf.default >> feeds.conf
           cat feeds.conf
 
-          ./scripts/feeds update -a > /dev/null
+          git config --global http.postBuffer 500M
+          for i in 1 2 3; do ./scripts/feeds update -a && break || sleep 5; done
           make defconfig
 
           ./scripts/feeds install -d y -f -a
@@ -455,7 +456,8 @@ jobs:
           cp feeds.conf.default feeds.conf
           cat feeds.conf
 
-          ./scripts/feeds update -a > /dev/null
+          git config --global http.postBuffer 500M
+          for i in 1 2 3; do ./scripts/feeds update -a && break || sleep 5; done
           make defconfig
 
           ./scripts/feeds install -d y -f -a