Apply --no-cache-dir to pip upgrade in DockerfileBase

Aligned pip upgrade command with others by adding the `--no-cache-dir`
flag to reduce image layer size.

DockerfileBase

@@ -34,7 +34,7 @@ apt-get update && \
         unpaper && \
     rm -rf /var/lib/apt/lists/* && \
     mv /usr/share/tesseract-ocr /usr/share/tesseract-ocr-original && \
-    pip install --upgrade pip && \
+    pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir --upgrade ocrmypdf && \
     pip install --no-cache-dir --upgrade pillow==10.0.1 reportlab==3.6.13 wheel==0.38.1 setuptools==65.5.1 pyjwt==2.4.0 cryptography==39.0.1