build(NoTicket): update sphinx-rtd-theme requirement from ==2.* to >=2,<4 (#459)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Florian Strübe <florian@firebolt.io>

Author: dependabot[bot]

setup.cfg

@@ -68,7 +68,7 @@ dev =
     types-cryptography==3.3.23.2
 docs =
     sphinx==7.*
-    sphinx-rtd-theme==2.*
+    sphinx-rtd-theme>=2,<4
 
 [options.package_data]
 firebolt = py.typed