package/libstrophe: fix tarball hash

package/libstrophe: fix tarball hash

Fix hash added by commit 28c7ff0bdb602e75d2891818ff87fe7fd4ed0015:
https://patchwork.ozlabs.org/project/buildroot/patch/20210104101054.5392-1-jubalh@iodoru.org

Says Michael:

    > ERROR: libstrophe-0.10.1.tar.gz has wrong sha256 hash:
    > ERROR: expected: 4918c47029ecdea2deab4b0f9336ca4a8bb12c28b72b2cec397d98664b94c771
    > ERROR: got     : 5bf0bbc555cb6059008f1b748370d4d2ee1e1fabd3eeab68475263556405ba39
    > ERROR: Incomplete download, or man-in-the-middle (MITM) attack

    I'm sorry about that. We had some disagreement at JasPer and we removed
    an existing tag and created the same tag on a different commit. Thus
    generating a different tarball under the same tag..

    I thought I only did the buildroot update after this, but maybe I
    remember wrong.

While at it, also update indentation in hash file (two spaces)

Fixes:
 - http://autobuild.buildroot.org/results/2f13af96eee20176ccb37ad32ec1472b4c9d6208

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[yann.morin.1998@free.fr: quote Michael's explanations]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>