update issue template

Author: NullPointerException

.github/workflows/build-ffmpeg.yml

@@ -26,7 +26,7 @@ jobs:
       - name: 安装依赖包
         run: |
           sudo apt-get update
-          sudo apt-get install -y autoconf automake libtool pkg-config curl git doxygen nasm cmake gcc gperf texinfo yasm bison autogen wget autopoint meson ninja-build ragel groff gtk-doc-tools libtasn1-6-dev libtasn1-bin
+          sudo apt-get install -y autoconf automake libtool pkg-config curl git doxygen nasm cmake gcc gperf texinfo yasm bison autogen wget autopoint meson ninja-build ragel groff gtk-doc-tools libtasn1-6-dev libtasn1-bin libgnutls28-dev libunistring-dev
 
       - name: 设置 Android SDK
         uses: android-actions/setup-android@v2