Update Linux QQ to version 3.2.21-42086 in install script

Bump the fixed Linux QQ version from 3.2.20-40990 to 3.2.21-42086 and update all related download URLs in the install.sh script for both amd64 and arm64 architectures.

Author: MliKiowa

script/install.sh

@@ -512,8 +512,9 @@ function download_napcat() {
 }
 
 function get_qq_target_version() {
-    #固定 3.2.20-40990 版本
-    linuxqq_target_version="3.2.20-40990"
+    #固定 3.2.21-42086 版本
+    
+    linuxqq_target_version="3.2.21-42086"
 }
 
 function compare_linuxqq_versions() {
@@ -633,18 +634,18 @@ function install_linuxqq_rootless() {
 
     if [ "${system_arch}" = "amd64" ]; then
         if [ "${package_installer}" = "rpm" ]; then
-            qq_download_url="https://dldir1.qq.com/qqfile/qq/QQNT/ec800879/linuxqq_3.2.20-40990_x86_64.rpm"
+            qq_download_url="https://dldir1.qq.com/qqfile/qq/QQNT/8015ff90/linuxqq_3.2.21-42086_x86_64.rpm"
             qq_package_file="QQ.rpm"
         elif [ "${package_installer}" = "dpkg" ]; then
-            qq_download_url="https://dldir1.qq.com/qqfile/qq/QQNT/ec800879/linuxqq_3.2.20-40990_amd64.deb"
+            qq_download_url="https://dldir1.qq.com/qqfile/qq/QQNT/8015ff90/linuxqq_3.2.21-42086_amd64.deb"
             qq_package_file="QQ.deb"
         fi
     elif [ "${system_arch}" = "arm64" ]; then
         if [ "${package_installer}" = "rpm" ]; then
-            qq_download_url="https://dldir1.qq.com/qqfile/qq/QQNT/ec800879/linuxqq_3.2.20-40990_aarch64.rpm"
+            qq_download_url="https://dldir1.qq.com/qqfile/qq/QQNT/8015ff90/linuxqq_3.2.21-42086_aarch64.rpm"
             qq_package_file="QQ.rpm"
         elif [ "${package_installer}" = "dpkg" ]; then
-            qq_download_url="https://dldir1.qq.com/qqfile/qq/QQNT/ec800879/linuxqq_3.2.20-40990_arm64.deb"
+            qq_download_url="https://dldir1.qq.com/qqfile/qq/QQNT/8015ff90/linuxqq_3.2.21-42086_arm64.deb"
             qq_package_file="QQ.deb"
         fi
     fi