termux-keyring: add grimler's new gpg key

I am in the process of switching to a new gpg key. This commit adds
both keys to the keyring, and in a few weeks or so I will deactivate
and remove the old one completely. The following message is signed
with my old key, to prove that this was done by me:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

In August 2021 I, Henrik Grimler, switched to a new gpg key. The old
key had fingerprint:

  B631 6860 9E88 39CA 9150  CE2D D9EF D568 91B2 BB50

while the new one has:

  2C7F 29AE 9789 1F64 19A9  E2CD B007 6E49 0B71 616B
-----BEGIN PGP SIGNATURE-----

iQEzBAEBCAAdFiEEm059JzlQJOpaT8Y5WqrJ4KRr5TwFAmEsj0YACgkQWqrJ4KRr
5TzQ7Af/Z0KTOQlNtxzJ2aE96v07pHCYc3ynlZoToUfWtgJ2XxkOZlviKRD5SC0M
zbv47IcWnquINGTyeEkZ6jdHd5XEDfkwe3JoyEVcr10v6vzQuAmETpHh1FcfE/2Q
5UqdcNxx3z34qxdWy9ntP+/SbETBsCrCcoJHa/q9UulR+OLwsoUjH83oxaB9nUph
QtaLX+u4hfbXJ9UhjIX/xgpLMOx9s4WORzIryz3HOffqD2YE2yo9SwFjjCJuvkbZ
VM1Gbpx0YabFWH9xqqaBwhjPXjKXGq5JNB1JpMnmagzylo7kTnztO8kDaLJoHPse
iHag4HjfO3R6T2hzX9SKmoK1sP2nNQ==
=huNj
-----END PGP SIGNATURE-----

packages/termux-keyring/build.sh

@@ -2,7 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://github.com/termux
 TERMUX_PKG_DESCRIPTION="GPG public keys for the official Termux repositories"
 TERMUX_PKG_LICENSE="Apache-2.0"
 TERMUX_PKG_MAINTAINER="@termux"
-TERMUX_PKG_VERSION=1.9
+TERMUX_PKG_VERSION=2.0
 TERMUX_PKG_SKIP_SRC_EXTRACT=true
 TERMUX_PKG_PLATFORM_INDEPENDENT=true