Add back aarch64 checksums

It seems we have problem: Because we do not have aarch64 in the arch array of the PKGBULD, updpkgsums will not update the checksums... I also tried

export CARCH=aarch64
makepkg -g
# or
makepkg -g -A

without success.

From man makepkg:

      -g, --geninteg
           For each source file in the source array of PKGBUILD, download the file if required and generate integrity checks. The integrity checks
           generated are determined by the checks present in the PKGBUILD, falling back to the value of the INTEGRITY_CHECK array in
           makepkg.conf(5) if these are absent. This output can be redirected into your PKGBUILD for source validation using "makepkg -g >>
           PKGBUILD".

For each source file in the source array of PKGBUILD...

For this merge request I added aarch64 to the array locally but did not check it in.

diff --git a/.SRCINFO b/.SRCINFO
index c3965a0..8f14a7b 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -5,6 +5,7 @@ pkgbase = obsidian
        url = https://obsidian.md
        install = obsidian.install
        arch = x86_64
+       arch = aarch64
        license = LicenseRef-Obsidian
        depends = glibc
        depends = gcc-libs
diff --git a/PKGBUILD b/PKGBUILD
index 0b9104e..2a79209 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -6,7 +6,7 @@ pkgname=obsidian
 pkgver=1.10.6
 pkgrel=1
 pkgdesc="A powerful knowledge base that works on top of a local folder of plain text Markdown files"
-arch=('x86_64')
+arch=('x86_64' 'aarch64')
 url="https://obsidian.md"
 license=('LicenseRef-Obsidian')
 depends=('glibc' 'gcc-libs' 'fontconfig' 'bash' 'zlib' 'hicolor-icon-theme' 'fuse' 'electron37')