Add dedicated PATH fix step after Conan installation

The get-conan action installs conan to ~/.local/bin via pip, but on
CentOS 7 containers there's also a system conan at /usr/bin/conan (v1.47).

Previously, the turtlebrowser/get-conan action would add its own path
to GITHUB_PATH, but the order wasn't guaranteed. This caused vfx2022
builds to find the old system conan instead of the newly-installed one.

By explicitly adding $HOME/.local/bin to GITHUB_PATH after both uv and
conan installation, we ensure that:
- uv-installed Python 3.11 is found before system Python 3.7
- pip-installed Conan 2.x is found before system Conan 1.47

Signed-off-by: Gary Oberbrunner <[email protected]>

Author: garyo

.github/workflows/build.yml

@@ -209,9 +209,6 @@ jobs:
           # This ensures the sigstore action can find 'python' (not just 'python3')
           uv python install --default 3.11
 
-          # Add ~/.local/bin to PATH for future steps
-          echo "$HOME/.local/bin" >> $GITHUB_PATH
-
       - name: Check python, uv paths
         run: |
           echo "PATH=$PATH"
@@ -226,6 +223,12 @@ jobs:
         with:
           version: ${{ matrix.conan_version }}
 
+      # Ensure ~/.local/bin is first in PATH for uv-installed Python and pip-installed Conan
+      # This is especially important for old CentOS 7 containers with old system python/conan
+      - name: Fix PATH for local tools
+        run: |
+          echo "$HOME/.local/bin" >> $GITHUB_PATH
+
       - name: Set up conan
         run: |
           which conan