Replace continue; with break; to avoid PHP 7.3 warnings

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

src/Wallabag/CoreBundle/GuzzleSiteAuthenticator/GrabySiteConfigBuilder.php

@@ -114,7 +114,7 @@ class GrabySiteConfigBuilder implements SiteConfigBuilder
         $extraFields = [];
         foreach ($extraFieldsStrings as $extraField) {
             if (false === strpos($extraField, '=')) {
-                continue;
+                break;
             }
 
             list($fieldName, $fieldValue) = explode('=', $extraField, 2);

src/Wallabag/CoreBundle/Helper/DownloadImages.php

@@ -56,7 +56,7 @@ class DownloadImages
             $imagePath = $this->processSingleImage($entryId, $image, $url, $relativePath);
 
             if (false === $imagePath) {
-                continue;
+                break;
             }
 
             // if image contains "&" and we can't find it in the html it might be because it's encoded as &

src/Wallabag/CoreBundle/Helper/RuleBasedTagger.php

@@ -37,7 +37,7 @@ class RuleBasedTagger
 
         foreach ($rules as $rule) {
             if (!$this->rulerz->satisfies($entry, $rule->getRule())) {
-                continue;
+                break;
             }
 
             $this->logger->info('Matching rule.', [

src/Wallabag/CoreBundle/Helper/TagsAssigner.php

@@ -49,7 +49,7 @@ class TagsAssigner
 
             // avoid empty tag
             if (0 === \strlen($label)) {
-                continue;
+                break;
             }
 
             if (isset($tagsNotYetFlushed[$label])) {