use precise explicit slash (#209)

be consistent with other .gitignore files

Author: wannevancamp

shopware/core/6.4/manifest.json

@@ -62,8 +62,8 @@
         "!/var/.htaccess",
         "/auth.json",
         "/install.lock",
-        "public/asset-manifest.json",
-        "files/asset-manifest.json"
+        "/public/asset-manifest.json",
+        "/files/asset-manifest.json"
     ],
     "composer-scripts": {
         "assets:install": "symfony-cmd"

shopware/core/6.6/manifest.json

@@ -62,7 +62,7 @@
         "!/var/.htaccess",
         "/auth.json",
         "/install.lock",
-        "public/asset-manifest.json"
+        "/public/asset-manifest.json"
     ],
     "composer-scripts": {
         "assets:install": "symfony-cmd"

shopware/core/6.7/manifest.json

@@ -63,7 +63,7 @@
         "!/var/.htaccess",
         "/auth.json",
         "/install.lock",
-        "public/asset-manifest.json"
+        "/public/asset-manifest.json"
     ],
     "composer-scripts": {
         "assets:install": "symfony-cmd"