"fix" a couple of http -> https redirects

Found with
urli-fix . -a http: -i pytest

src/_pytest/cacheprovider.py

@@ -50,7 +50,7 @@ CACHEDIR_TAG_CONTENT = b"""\
 Signature: 8a477f597d28d172789f06886806bc55
 # This file is a cache directory tag created by pytest.
 # For information about cache directory tags, see:
-#	http://www.bford.info/cachedir/spec.html
+#	https://bford.info/cachedir/spec.html
 """
 
 

src/_pytest/recwarn.py

@@ -28,7 +28,7 @@ T = TypeVar("T")
 def recwarn() -> Generator["WarningsRecorder", None, None]:
     """Return a :class:`WarningsRecorder` instance that records all warnings emitted by test functions.
 
-    See http://docs.python.org/library/warnings.html for information
+    See https://docs.python.org/library/warnings.html for information
     on warning categories.
     """
     wrec = WarningsRecorder(_ispytest=True)