fix(example): web obfuscation not working (#1766)

Author: buenaflor

flutter/example/run.sh

@@ -6,7 +6,10 @@ set -euo pipefail
 # Or try out the Alpha version of the Sentry Dart Plugin that does it automatically for you, feedback is welcomed.
 # https://github.com/getsentry/sentry-dart-plugin
 
-export SENTRY_RELEASE=$(date +%Y-%m-%d_%H-%M-%S)
+VERSION=$(grep '^version:' pubspec.yaml | awk '{print $2}')
+CURRENT_DATE=$(date +%Y-%m-%d_%H-%M-%S)
+
+export SENTRY_RELEASE="$CURRENT_DATE"@"$VERSION"
 
 echo -e "[\033[92mrun\033[0m] $1"
 
@@ -23,7 +26,7 @@ elif [ "$1" == "android" ]; then
     launchCmd='adb shell am start -n io.sentry.samples.flutter/io.sentry.samples.flutter.MainActivity'
     echo -e "[\033[92mrun\033[0m] Android app installed"
 elif [ "$1" == "web" ]; then
-    flutter build web --dart-define=SENTRY_RELEASE=$SENTRY_RELEASE --source-maps
+    flutter build web --dart-define=SENTRY_RELEASE="$SENTRY_RELEASE" --source-maps
     buildDir='./build/web/'
     port='8132'
     ls -lah $buildDir