[LyX/2.3.x] Add macOS 11 to SDK detection for builds on Mac

[Stephan Witt]

commit f4cd2e863bd0db9f9f8a0889297069fa4beb5702
Author: Stephan Witt <switt at lyx.org>
Date:   Sun May 30 17:22:42 2021 +0200

    Add macOS 11 to SDK detection for builds on Mac
    
    (cherry picked from commit 187a9d643902215f881d172ca7c7da71b341bb2c)
---
 development/LyX-Mac-binary-release.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/development/LyX-Mac-binary-release.sh b/development/LyX-Mac-binary-release.sh
index 282822e..a4b410a 100644
--- a/development/LyX-Mac-binary-release.sh
+++ b/development/LyX-Mac-binary-release.sh
@@ -378,7 +378,7 @@ DMGNAME="${LyxBase}${LyXGitCommitHash:+-}${LyXGitCommitHash}"
 DMGSIZE="550m"
 
 # Check for existing SDKs
-SDKs=$(echo ${DEVELOPER_SDKS}/MacOSX10*sdk)
+SDKs=$(echo ${DEVELOPER_SDKS}/MacOSX1[01]*sdk)
 case $SDKs in
 *${SDKROOT}*)
 	;;