Dockerfile: update pip from v23.2.* to v24.2.*

Dockerfile

@@ -3,7 +3,7 @@ MAINTAINER Philipp D. Rohde <philipp.rohde@tib.eu>
 
 # install dependencies
 COPY requirements.txt /TravSHACL/requirements.txt
-RUN python -m pip install --upgrade --no-cache-dir pip==23.2.* && \
+RUN python -m pip install --upgrade --no-cache-dir pip==24.2.* && \
     python -m pip install --no-cache-dir -r /TravSHACL/requirements.txt
 
 # copy the source code into the container