add alternative links for bfm and its usm tool

because bfm is currently dead

_pages/en_US/installing-boot9strap-(usm).txt

@@ -27,6 +27,7 @@ If your (Right/Left Shoulder), (D-Pad Up) or (A) buttons do not work, you will n
 #### Section I - Prep Work
 
 1. Open [unSAFE_MODE-bb3 tool](https://usm.bruteforcemovable.com/) on your computer
+  + If this site is nonfunctional, try using [this one](https://3ds.nhnarwhal.com/3dstools/unsafemode.php)
 1. Upload your movable.sed using the "Choose File" option
 1. Click "Download unSAFE_MODE-bb3 archive"
   + This will download an exploit DSiWare called `F00D43D5.bin` and a SAFE_MODE exploit data file called `usm.bin` inside of a zip folder (`unSAFE_MODE-bb3.zip`)

_pages/en_US/seedminer.txt

@@ -56,7 +56,8 @@ There are several different methods that build on the Seedminer exploit, so even
 
 1. Open [Bruteforce Movable](https://seedminer.hacks.guide/) on your computer
   + This site can automate the retrieval of `movable_part1.sed` (using a bot 3DS console) and the breaking of your device's DSiWare encryption (using a volunteer's computer to run Seedminer)
-  + If the automated service is nonfunctional, join [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp) and ask (in English) for someone there to assist you
+  + If this site is nonfunctional, try using [this one](https://bfm.nintendohomebrew.com/)
+  + If both of these sites are nonfunctional, join [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp) and ask (in English) for someone there to assist you
 1. Enter your device's Friend Code (with no spaces or dashes) into the "Your friend code" field
 1. Paste your device's 32 character long folder name into the "Your ID0" field
   + Do not attempt to enter the ID0 by hand. Ensure the ID0 is entered correctly by copying and pasting it from where you saved it in the previous section