Update mingw toolchain stuff (#2253)

files/en-us/mozilla/developer_guide/build_instructions/cross_compile_mozilla_for_mingw32/index.html

@@ -20,19 +20,19 @@ <h3 id="Build_a_GCC_mingw_cross-compiler">The mingw-clang cross-compiler</h3>
 
 <p>You can download the toolchain directly using the following links:</p>
 
-<p>x86: <a href="https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-clang-9-mingw-x86.latest/artifacts/public/build/clangmingw.tar.zst">https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-clang-9-mingw-x86.latest/artifacts/public/build/clangmingw.tar.zst</a></p>
+<p>x86: <a href="https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-clang-11-mingw-x86.latest/artifacts/public/build/clangmingw.tar.zst">https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-clang-11-mingw-x86.latest/artifacts/public/build/clangmingw.tar.zst</a></p>
 
-<p>x64: <a href="https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-clang-9-mingw-x64.latest/artifacts/public/build/clangmingw.tar.zst">https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-clang-9-mingw-x64.latest/artifacts/public/build/clangmingw.tar.zst</a></p>
+<p>x64: <a href="https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-clang-11-mingw-x64.latest/artifacts/public/build/clangmingw.tar.zst">https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-clang-11-mingw-x64.latest/artifacts/public/build/clangmingw.tar.zst</a></p>
 
-<p>Note that these may be out of date, as of June 2020 we intend to switch to clang 10 soon. Look in <a href="https://searchfox.org/mozilla-central/source/taskcluster/ci/toolchain/clang.yml">https://searchfox.org/mozilla-central/source/taskcluster/ci/toolchain/clang.yml</a> to see which toolchain has the alias '<code class="source-line">linux64-clang-mingw-x86'</code></p>
+<p>Note that these may be out of date, they are correct as of Feb 2021, but we upgrade compilers.  Look in <a href="https://searchfox.org/mozilla-central/source/taskcluster/ci/toolchain/clang.yml">https://searchfox.org/mozilla-central/source/taskcluster/ci/toolchain/clang.yml</a> to see which toolchain has the alias '<code class="source-line">linux64-clang-mingw-x86'</code> - the links provided are for clang 11.</p>
 
 <h3 id="Other_mingw_tools">Other mingw tools</h3>
 
 <h4 id="download">download</h4>
 
 <p>Easiest is just to download them:</p>
 
-<p>rust: <a href="https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.mingw32-rust-1.43.latest/artifacts/public/build/rustc.tar.zst">https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.mingw32-rust-1.43.latest/artifacts/public/build/rustc.tar.zst</a> (by the time you read this, this will probably be out of date though as we bump rust every FF version. see which version has the alias 'mingw32-rust' in <a href="https://searchfox.org/mozilla-central/source/taskcluster/ci/toolchain/rust.yml">this file</a>)</p>
+<p>rust: <a href="https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.mingw32-rust-1.49.latest/artifacts/public/build/rustc.tar.zst">https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.mingw32-rust-1.49.latest/artifacts/public/build/rustc.tar.zst</a> (by the time you read this, this will probably be out of date though as we bump rust every FF version. see which version has the alias 'mingw32-rust' in <a href="https://searchfox.org/mozilla-central/source/taskcluster/ci/toolchain/rust.yml">this file</a>)</p>
 
 <p>cbindgen: <a href="https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-cbindgen.latest/artifacts/public/build/cbindgen.tar.xz">https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.cache.level-3.toolchains.v3.linux64-cbindgen.latest/artifacts/public/build/cbindgen.tar.xz</a></p>