ci: Pin uv to latest working version

uv 0.12.0 drops support for certain compression algorithms, and some
of our transitive dependencies use them, meaning they cannot be
installed with uv 0.12.0.

Signed-off-by: Kacper Słomiński <kslominski@antmicro.com>

Author: kslominski-ant

.github/workflows/tests-and-docs.yml

@@ -67,7 +67,7 @@ jobs:
 
       - name: Install Python dependencies
         run: |
-          python -m pip install uv
+          python -m pip install "uv==0.11.33"
           uv sync
 
       - name: Generate timing docs
@@ -868,7 +868,7 @@ jobs:
 
       - name: Setup Python environment (uv)
         run: |
-          python3 -m pip install uv
+          python3 -m pip install "uv==0.11.33"
           uv sync
           uv pip install -r doc/requirements.txt