[pauthabielf64] Fix typo in relocation name

As pointed out in #253
the R_AARCH64_AUTH_GOT_LO12_NC is meant to be the AUTH variant of
R_AARCH64_LD64_GOT_LO12_NC. As there is also a
R_AARCH64_LD32_GOT_LO12_NC relocation rename the relocation to
R_AARCH64_LD64_AUTH_GOT_LO12_NC.

These relocations are in the appendix as we are currently
expecting the GOT to be RELRO and unsigned in most signing schemas.

pauthabielf64/pauthabielf64.rst

@@ -1143,7 +1143,7 @@ The GOT entries must be relocated by AUTH variant dynamic relocations.
   |             |                                        |                                  | check that –2\ :sup:`32` |
   |             |                                        |                                  | <= X < 2\ :sup:`32`      |
   +-------------+----------------------------------------+----------------------------------+--------------------------+
-  | 0x811A      | R\_AARCH64\_AUTH\_GOT\_LO12_NC         | G(ENCD(GDAT(S + A)))             | Set the LD/ST immediate  |
+  | 0x811A      | R\_AARCH64\_AUTH\_LD64\_GOT\_LO12_NC   | G(ENCD(GDAT(S + A)))             | Set the LD/ST immediate  |
   |             |                                        |                                  | field to bits [11:3] of  |
   |             |                                        |                                  | X. No overflow check;    |
   |             |                                        |                                  | check that X&7 = 0       |