build: Unpin python-slugify constraint (#31561)

* build: Unpin python-slugify constraint.

requirements/constraints.txt

@@ -93,8 +93,7 @@ docutils<0.19
 # so adding following constraints and will unpin one by one.
 
 django-ratelimit<4.0.0
-python-slugify<7.0.0
-django-countries==7.4.2
+django-countries==7.4.2   # Rename Turkey to Türkiye. It needs approval.
 sphinxcontrib-openapi[markdown]==0.7.0
 icalendar==5.0.1
 cryptography==38.0.4 # greater version has some issues.

requirements/edx/base.txt

@@ -910,10 +910,8 @@ python-levenshtein==0.20.9
     # via -r requirements/edx/base.in
 python-memcached==1.59
     # via -r requirements/edx/paver.txt
-python-slugify==6.1.2
-    # via
-    #   -c requirements/edx/../constraints.txt
-    #   code-annotations
+python-slugify==7.0.0
+    # via code-annotations
 python-swiftclient==4.1.0
     # via ora2
 python3-openid==3.2.0 ; python_version >= "3"

requirements/edx/development.txt

@@ -1275,9 +1275,8 @@ python-levenshtein==0.20.9
     # via -r requirements/edx/testing.txt
 python-memcached==1.59
     # via -r requirements/edx/testing.txt
-python-slugify==6.1.2
+python-slugify==7.0.0
     # via
-    #   -c requirements/edx/../constraints.txt
     #   -r requirements/edx/testing.txt
     #   code-annotations
 python-swiftclient==4.1.0

requirements/edx/doc.txt

@@ -48,10 +48,8 @@ pbr==5.11.1
     # via stevedore
 pygments==2.14.0
     # via sphinx
-python-slugify==6.1.2
-    # via
-    #   -c requirements/edx/../constraints.txt
-    #   code-annotations
+python-slugify==7.0.0
+    # via code-annotations
 pytz==2022.2.1
     # via
     #   -c requirements/edx/../constraints.txt

requirements/edx/testing.txt

@@ -1205,9 +1205,8 @@ python-levenshtein==0.20.9
     # via -r requirements/edx/base.txt
 python-memcached==1.59
     # via -r requirements/edx/base.txt
-python-slugify==6.1.2
+python-slugify==7.0.0
     # via
-    #   -c requirements/edx/../constraints.txt
     #   -r requirements/edx/base.txt
     #   code-annotations
 python-swiftclient==4.1.0