Revert "Fix typo: transactions -> transaction's (ordinals#3398)"

This reverts commit 360e5ac.

docs/src/runes/specification.md

@@ -462,7 +462,7 @@ If a valid commitment is not present, the etching is ignored.
 A runestone may mint a rune by including the rune's ID in the `Mint` field.
 
 If the mint is open, the mint amount is added to the unallocated runes in the
-transaction's inputs. These runes may be transferred using edicts, and will
+transactions inputs. These runes may be transferred using edicts, and will
 otherwise be transferred to the first non-`OP_RETURN` output, or the output
 designated by the `Pointer` field.