minor #32800 Improve some URLs (Arman-Hosseini)

This PR was squashed before being merged into the 3.4 branch (closes #32800).

Discussion
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Improve some URLs

| Q             | A
| ------------- | ---
| Branch?       | 3.4 <!-- see below -->
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | N/A   <!-- #-prefixed issue number(s), if any -->
| License       | MIT
| Doc PR        | N/A <!-- required for new features -->

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understand your PR and can be used as a start for the documentation.

Additionally (see https://symfony.com/roadmap):
 - Bug fixes must be submitted against the lowest maintained branch where they apply
   (lowest branches are regularly merged to upper ones so they get the fixes too).
 - Features and deprecations must be submitted against branch 4.4.
 - Legacy code removals go to the master branch.
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Commits
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fab17a4487 Improve some URLs

Author: nicolas-grekas

Constraints/AbstractComparisonValidator.php

@@ -64,7 +64,7 @@ public function validate($value, Constraint $constraint)
         // Convert strings to DateTimes if comparing another DateTime
         // This allows to compare with any date/time value supported by
         // the DateTime constructor:
-        // http://php.net/manual/en/datetime.formats.php
+        // https://php.net/datetime.formats
         if (\is_string($comparedValue)) {
             if ($value instanceof \DateTimeImmutable) {
                 // If $value is immutable, convert the compared value to a

Constraints/RangeValidator.php

@@ -48,7 +48,7 @@ public function validate($value, Constraint $constraint)
         // Convert strings to DateTimes if comparing another DateTime
         // This allows to compare with any date/time value supported by
         // the DateTime constructor:
-        // http://php.net/manual/en/datetime.formats.php
+        // https://php.net/datetime.formats
         if ($value instanceof \DateTimeInterface) {
             if (\is_string($min)) {
                 $min = new \DateTime($min);

Tests/Constraints/IpValidatorTest.php

@@ -326,7 +326,7 @@ public function getInvalidReservedIpsV6()
     {
         // Quoting after official filter documentation:
         // "FILTER_FLAG_NO_RES_RANGE = This flag does not apply to IPv6 addresses."
-        // Full description: http://php.net/manual/en/filter.filters.flags.php
+        // Full description: https://php.net/filter.filters.flags
         return $this->getInvalidIpsV6();
     }