[UPDATE] Update celery requirement from <7,>=5.6.2 to >=5.6.3,<7

Updates the requirements on [celery](https://github.com/celery/celery) to permit the latest version.
- [Release notes](https://github.com/celery/celery/releases)
- [Changelog](https://github.com/celery/celery/blob/v5.6.3/Changelog.rst)
- [Commits](https://github.com/celery/celery/compare/v5.6.2...v5.6.3)

---
updated-dependencies:
- dependency-name: celery
  dependency-version: 5.6.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -19,7 +19,7 @@ authors = [
 license = { text = "GPL-3.0-only" }
 requires-python = "<4.0,>=3.12"
 dependencies = [
-    "django>=5.2.13,<6.0.0",
+    "django>=5.2.12,<6.0.0",
     "django-ninja>=1.5.3,<6.0.0",
     "django-ninja-extra>=0.31.0",
     "Pillow>=12.1.1,<13.0.0",
@@ -30,7 +30,7 @@ dependencies = [
     "phonenumbers>=9.0.25,<10.0.0",
     "reportlab>=4.4.10,<5.0.0",
     "django-haystack<4.0.0,>=3.3.0",
-    "xapian-haystack<3.1.0,<5.0.0",
+    "xapian-haystack<4.0.0,>=3.1.0",
     "libsass<1.0.0,>=0.23.0",
     "django-ordered-model<4.0.0,>=3.7.4",
     "django-simple-captcha<1.0.0,>=0.6.3",
@@ -45,11 +45,11 @@ dependencies = [
     "pydantic-extra-types>=2.11.0,<3.0.0",
     "ical>=11.1.0,<12",
     "redis[hiredis]>=5.3.0,<8.0.0",
-    "environs[django]>=14.5.0,<16.0.0",
+    "environs[django]>=14.5.0,<15.0.0",
     "requests>=2.32.5,<3.0.0",
     "honcho>=2.0.0",
     "psutil>=7.2.2,<8.0.0",
-    "celery[redis]>=5.6.2,<7",
+    "celery[redis]>=5.6.3,<7",
     "django-celery-results>=2.5.1",
     "django-celery-beat>=2.9.0",
 ]