Fix the pre-submit for the flutter-intellij project (#7938)

With the current version of `git` used by the presubmits an issue is
being hit. See #7937 for
context

Author: jwren

.github/workflows/presubmit.yaml

@@ -9,7 +9,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
   workflow_dispatch:
 
 permissions:

.github/workflows/presubmit.yaml.template

@@ -7,7 +7,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
   workflow_dispatch:
 
 permissions:

tool/github.sh

@@ -10,7 +10,7 @@ set -e
 export JAVA_HOME=$JAVA_HOME_17_X64
 
 # Clone and configure Flutter to the latest stable release
-git clone --depth 1 -b stable --single-branch https://github.com/flutter/flutter.git ../flutter
+git clone --depth 1 https://github.com/flutter/flutter.git ../flutter
 export PATH="$PATH":`pwd`/../flutter/bin:`pwd`/../flutter/bin/cache/dart-sdk/bin
 flutter config --no-analytics
 flutter doctor