CI: Update deps to 2025-08-23 release

Notable Changes:
 * deps.qt: Backport upstream patch removing AGL linkage from macOS

There are no dependency version updates in this deps release. The Qt
change is to ensure that OBS Studio will build with Xcode 26.

buildspec.json

@@ -1,28 +1,28 @@
 {
     "dependencies": {
         "prebuilt": {
-            "version": "2025-07-11",
+            "version": "2025-08-23",
             "baseUrl": "https://github.com/obsproject/obs-deps/releases/download",
             "label": "Pre-Built obs-deps",
             "hashes": {
-                "macos-universal": "495687e63383d1a287684b6e2e9bfe246bb8f156fe265926afb1a325af1edd2a",
-                "windows-x64": "c8c642c1070dc31ce9a0f1e4cef5bb992f4bff4882255788b5da12129e85caa7",
-                "windows-x86": "85e3503d254abbdd1155b058cb7df14da33b862d5a3c058c728456f71a69841b",
-                "windows-arm64": "f581cc61e8f734a8b12d485fc8662a408ca59d222814e4b37bce115bd442fb04"
+                "macos-universal": "9403bb43fb0a9bb215739a5659ca274fe884dbbbcd22bd9ca781c961fb041c42",
+                "windows-x64": "8de229cff6f1981508c0eb646b35e644633a5855787b9f5d3b90ae2aeb87ffc1",
+                "windows-x86": "fb3c68b75911f292b3206e346053638db1c73605957207445a0a92b33ab5e00a",
+                "windows-arm64": "dd87ba00a6cbc153182fb62b3678a3b5021d1d11eb2730442060937a645eb97e"
             }
         },
         "qt6": {
-            "version": "2025-07-11",
+            "version": "2025-08-23",
             "baseUrl": "https://github.com/obsproject/obs-deps/releases/download",
             "label": "Pre-Built Qt6",
             "hashes": {
-                "macos-universal": "d3f5f04b6ea486e032530bdf0187cbda9a54e0a49621a4c8ba984c5023998867",
-                "windows-x64": "0e76bf0555dd5382838850b748d3dcfab44a1e1058441309ab54e1a65b156d0a",
-                "windows-arm64": "7aab240504931f32ea8e8d208a912a0d6ddbd78c16858f2e559c7c9b29ab9326"
+                "macos-universal": "990f11638b80a4509e14e8c315f6e4caa0861e37fcd3113a256fbff835ffca29",
+                "windows-x64": "c62e82483bc7c0bf199e8ac3220c66a85a6e8a0cd69a05b6d44f873b830e415f",
+                "windows-arm64": "cc8ec983de9b7d81aa98beeb1b989d707ee3c73b85b4d41c85d94114eba81f91"
             },
             "debugSymbols": {
-                "windows-x64": "11b7be92cf66a273299b8f3515c07a5cfb61614b59a4e67f7fc5ecba5e2bdf21",
-                "windows-arm64": "884ae08291b5c87d83a7b0004ea8db356530c1f4ff9bdc814b5d599a8d28a152"
+                "windows-x64": "aae88a17e0211cb37db6a8602f2e20d69255be1f9700c699008ca5adbce1dde2",
+                "windows-arm64": "6e866490277a8b29e82a87fc2f22407f93ddaf86444ea0d284370339a05511b3"
             }
         },
         "cef": {