DOCS/contribute.md, zimg: remove 2 instances of an extraneous "s"

DOCS/contribute.md

@@ -41,7 +41,7 @@ Copyright of contributions
   behalf of your employer, and the employer owns the copyright, you must mention
   this. If the license of the code is not LGPLv2.1+, you must mention this.
 - These license statements are legally binding.
-- Don't use fake names (something that looks like an actual names, and may be
+- Don't use fake names (something that looks like an actual name, and may be
   someone else's name, but is not your legal name). Using a pseudonyms is
   allowed if it can be used to identify or contact you, even if whatever
   account you used to submit the patch dies.

video/zimg.c

@@ -576,7 +576,7 @@ static void setup_regular_rgb_packer(struct mp_zimg_repack *r)
     for (int i = 0; i < MP_ARRAY_SIZE(regular_repackers); i++) {
         const struct regular_repacker *pa = &regular_repackers[i];
 
-        // The following may assumes little endian (because some repack backends
+        // The following may assume little endian (because some repack backends
         // use word access, while the metadata here uses byte access).
 
         int prepad = p->components[0] ? 0 : 8;