ci: fix failures (#3137)

Fix CI failures

.github/workflows/_python.yml

@@ -28,7 +28,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.x"
+          python-version: "3.12"
       - uses: actions/cache@v4
         with:
           path: ~/.cache/pip

.github/workflows/housekeeping.yml

@@ -62,6 +62,7 @@ jobs:
             --exclude 'https://www.ascap.com'
             --exclude 'https://www.youtube-nocookie.com'
             --exclude 'github\.com/libretime/libretime/(issues|pulls)'
+            --exclude 'https://packages.ubuntu.com/bionic/liquidsoap'
             --exclude 'https://packages.ubuntu.com/bionic/php7.2'
             --exclude 'https://packages.ubuntu.com/bionic/python3'
             --cache

.github/workflows/project.yml

@@ -19,7 +19,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.x"
+          python-version: "3.12"
 
       - uses: actions/cache@v4
         with: