Pontoon/AMO Frontend: Update Slovak (sk), Polish (pl)

Co-authored-by: wladow <[email protected]> (sk)
Co-authored-by: dex <[email protected]> (pl)

Author: mozilla-pontoon

locale/pl/LC_MESSAGES/amo.po

@@ -1670,11 +1670,11 @@ msgstr "Uprawnienia"
 
 #: src/amo/components/PermissionsCard/index.js:84
 msgid "Required permissions:"
-msgstr ""
+msgstr "Wymagane uprawnienia:"
 
 #: src/amo/components/PermissionsCard/index.js:94
 msgid "Optional permissions:"
-msgstr ""
+msgstr "Opcjonalne uprawnienia:"
 
 #: src/amo/components/PermissionsCard/permissions.js:27
 msgid "Read and modify bookmarks"

locale/sk/LC_MESSAGES/amo.po

@@ -1678,7 +1678,7 @@ msgstr "Povolenia"
 
 #: src/amo/components/PermissionsCard/index.js:84
 msgid "Required permissions:"
-msgstr ""
+msgstr "Požadované oprávnenia:"
 
 #: src/amo/components/PermissionsCard/index.js:94
 msgid "Optional permissions:"