Revert "fix: 更新5.15.16"

This reverts commit f41ddf5.

Author: s12mmm3

.github/workflows/macos.yml

@@ -15,8 +15,8 @@ jobs:
       # 矩阵配置
       matrix:
         include:
-          # 5.15.16
-          - qt_version: 5.15.16
+          # 5.15.2
+          - qt_version: 5.15.2
             qt_arch: clang_64
           # 6.2.4
           - qt_version: 6.2.4

.github/workflows/ubuntu.yml

@@ -18,8 +18,8 @@ jobs:
           # 5.12.12
           - qt_version: 5.12.12
             qt_arch: gcc_64
-          # 5.15.16
-          - qt_version: 5.15.16
+          # 5.15.2
+          - qt_version: 5.15.2
             qt_arch: gcc_64
           # 6.2.4
           - qt_version: 6.2.4

.github/workflows/windows.yml

@@ -23,11 +23,11 @@ jobs:
           - qt_version: 5.12.12
             qt_arch: win64_msvc2017_64
             arch: x64
-          # 5.15.16
-          - qt_version: 5.15.16
+          # 5.15.2
+          - qt_version: 5.15.2
             qt_arch: win32_msvc2019
             arch: win32
-          - qt_version: 5.15.16
+          - qt_version: 5.15.2
             qt_arch: win64_msvc2019_64
             arch: x64
           # 6.2.4