Update face-recognition dependency pins to match the tutorial (#809)

The tutorial "Build Your Own Face Recognition Tool With Python" was
refreshed in the CMS and its requirements.txt block now pins current
releases. These seven files still carried the 2023-era pins, so anyone
downloading the materials built a different environment than the article
describes.

  dlib       19.24.0 -> 20.0.1
  numpy      1.24.2  -> 2.5.2
  Pillow     9.4.0   -> 12.3.0
  setuptools (absent) -> 81.0.0

face-recognition stays at 1.3.0, its latest release (2020-02-20).

The setuptools pin is the load-bearing one. face_recognition_models does
`from pkg_resources import resource_filename` at import time, and
setuptools removed pkg_resources in 82.0.0 -- the 81.0.0 wheel ships 19
files under pkg_resources/, the 82.0.0 wheel ships none. Without the pin,
`import face_recognition` aborts with "Please install face_recognition_models".

Co-authored-by: realpython-bot <bot@realpython.com>
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Co-authored-by: Martin Breuss <martin-martin@users.noreply.github.com>

Author: 4 people

face-recognition/source_code_final/requirements.txt

@@ -1,4 +1,5 @@
-dlib==19.24.0
+dlib==20.0.1
 face-recognition==1.3.0
-numpy==1.24.2
-Pillow==9.4.0
+numpy==2.5.2
+Pillow==12.3.0
+setuptools==81.0.0

face-recognition/source_code_step_1/requirements.txt

@@ -1,4 +1,5 @@
-dlib==19.24.0
+dlib==20.0.1
 face-recognition==1.3.0
-numpy==1.24.2
-Pillow==9.4.0
+numpy==2.5.2
+Pillow==12.3.0
+setuptools==81.0.0

face-recognition/source_code_step_2/requirements.txt

@@ -1,4 +1,5 @@
-dlib==19.24.0
+dlib==20.0.1
 face-recognition==1.3.0
-numpy==1.24.2
-Pillow==9.4.0
+numpy==2.5.2
+Pillow==12.3.0
+setuptools==81.0.0

face-recognition/source_code_step_3/requirements.txt

@@ -1,4 +1,5 @@
-dlib==19.24.0
+dlib==20.0.1
 face-recognition==1.3.0
-numpy==1.24.2
-Pillow==9.4.0
+numpy==2.5.2
+Pillow==12.3.0
+setuptools==81.0.0

face-recognition/source_code_step_4/requirements.txt

@@ -1,4 +1,5 @@
-dlib==19.24.0
+dlib==20.0.1
 face-recognition==1.3.0
-numpy==1.24.2
-Pillow==9.4.0
+numpy==2.5.2
+Pillow==12.3.0
+setuptools==81.0.0

face-recognition/source_code_step_5/requirements.txt

@@ -1,4 +1,5 @@
-dlib==19.24.0
+dlib==20.0.1
 face-recognition==1.3.0
-numpy==1.24.2
-Pillow==9.4.0
+numpy==2.5.2
+Pillow==12.3.0
+setuptools==81.0.0

face-recognition/source_code_step_6/requirements.txt

@@ -1,4 +1,5 @@
-dlib==19.24.0
+dlib==20.0.1
 face-recognition==1.3.0
-numpy==1.24.2
-Pillow==9.4.0
+numpy==2.5.2
+Pillow==12.3.0
+setuptools==81.0.0