Bump taskcluster from 24.2.0 to 24.3.0 in /requirements (#5973)

Bumps [taskcluster](https://github.com/taskcluster/taskcluster) from 24.2.0 to 24.3.0.
- [Release notes](https://github.com/taskcluster/taskcluster/releases)
- [Changelog](https://github.com/taskcluster/taskcluster/blob/master/CHANGELOG.md)
- [Commits](https://github.com/taskcluster/taskcluster/compare/v24.2.0...v24.3.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements/common.txt

@@ -244,10 +244,10 @@ slugid==2.0.0 \
     --hash=sha256:aec8b0e01c4ad32e38e12d609eab3ec912fd129aaf6b2ded0199b56a5f8fd67c \
     --hash=sha256:a950d98b72691178bdd4d6c52743c4a2aa039207cf7a97d71060a111ff9ba297
 
-taskcluster==24.2.0 \
-    --hash=sha256:685bfd2eee98f5336cfbefeff1ccc4a8bcf074ca5695b90306dc75a937fa77a1 \
-    --hash=sha256:8c65a5aeeb7d151f33fe0c70616c72b04622034332ccf66869cac1348986d04d \
-    --hash=sha256:dc8588f8d1cce008de74ba3f13bbcae8621ab453af594ce99f657797720fda66
+taskcluster==24.3.0 \
+    --hash=sha256:b7af65930516cbb8549bebb4197d36326c381eb3c09203cd34a4d541ca83c170 \
+    --hash=sha256:efa8e036bc4388dabb4e6fcf66c4c91f770113ba6376ef1c6bab51fb8aecff8f \
+    --hash=sha256:8ba68ed6d0e227c4e9149c2cea47ca47fc074d90bb7639f161985427d79c6ab8
 
 aiohttp==3.6.2 \
     --hash=sha256:1e984191d1ec186881ffaed4581092ba04f7c61582a177b187d3a2f07ed9719e \