chore: remove pip lock from Dockerfiles

Dockerfile

@@ -25,7 +25,7 @@ FROM base as python-deps
 RUN  apt-get update \
   && apt-get -y install build-essential libssl-dev git libffi-dev libgfortran5 pkg-config cmake gcc \
   && apt-get clean \
-  && pip install --upgrade "pip<=24.0" wheel
+  && pip install --upgrade pip wheel
 
 # Install TA-lib
 COPY build_helpers/* /tmp/

docker/Dockerfile.armhf

@@ -17,7 +17,7 @@ RUN mkdir /freqtrade \
   && chown ftuser:ftuser /freqtrade \
   # Allow sudoers
   && echo "ftuser ALL=(ALL) NOPASSWD: /bin/chown" >> /etc/sudoers \
-  && pip install --upgrade "pip<=24.0"
+  && pip install --upgrade pip
 
 WORKDIR /freqtrade