Bump librt from 0.8.0 to 0.9.0 (#12372)

Bumps [librt](https://github.com/mypyc/librt) from 0.8.0 to 0.9.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/mypyc/librt/commit/8f66cfe9cb3611b32741dd5b00e9049a627d6ccb"><code>8f66cfe</code></a>
Bump version to 0.9.0</li>
<li><a
href="https://github.com/mypyc/librt/commit/149b3698bc3f6f7724f3fe6148938d6a4bc0d421"><code>149b369</code></a>
Sync mypy including extract_symbol() PR (<a
href="https://redirect.github.com/mypyc/librt/issues/37">#37</a>)</li>
<li><a
href="https://github.com/mypyc/librt/commit/05c11113460b73eb8ecc90adf539996012510169"><code>05c1111</code></a>
Use PEP 639 license metadata (<a
href="https://redirect.github.com/mypyc/librt/issues/34">#34</a>)</li>
<li><a
href="https://github.com/mypyc/librt/commit/e9c167e17aa3c1e949befa90cc8d062fea6eeaaa"><code>e9c167e</code></a>
Sync mypy</li>
<li>See full diff in <a
href="https://github.com/mypyc/librt/compare/v0.8.0...v0.9.0">compare
view</a></li>
</ul>
</details>
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requirements/constraints.txt

@@ -104,7 +104,7 @@ jinja2==3.1.6
     # via
     #   sphinx
     #   towncrier
-librt==0.8.0
+librt==0.9.0
     # via mypy
 markdown-it-py==4.0.0
     # via rich

requirements/dev.txt

@@ -102,7 +102,7 @@ jinja2==3.1.6
     # via
     #   sphinx
     #   towncrier
-librt==0.8.0
+librt==0.9.0
     # via mypy
 markdown-it-py==4.0.0
     # via rich

requirements/lint.txt

@@ -45,7 +45,7 @@ iniconfig==2.3.0
     # via pytest
 isal==1.7.2
     # via -r requirements/lint.in
-librt==0.8.0
+librt==0.9.0
     # via mypy
 markdown-it-py==4.0.0
     # via rich

requirements/test-common.txt

@@ -34,7 +34,7 @@ iniconfig==2.3.0
     # via pytest
 isal==1.8.0 ; python_version < "3.14"
     # via -r requirements/test-common.in
-librt==0.8.0
+librt==0.9.0
     # via mypy
 markdown-it-py==4.0.0
     # via rich

requirements/test-ft.txt

@@ -55,7 +55,7 @@ iniconfig==2.3.0
     # via pytest
 isal==1.8.0 ; python_version < "3.14"
     # via -r requirements/test-common.in
-librt==0.8.0
+librt==0.9.0
     # via mypy
 markdown-it-py==4.0.0
     # via rich

requirements/test.txt

@@ -55,7 +55,7 @@ iniconfig==2.3.0
     # via pytest
 isal==1.7.2 ; python_version < "3.14"
     # via -r requirements/test-common.in
-librt==0.8.0
+librt==0.9.0
     # via mypy
 markdown-it-py==4.0.0
     # via rich