Revert "Disable static linking in GHA because of #169"

This reverts commit 274aeaa.

Author: pdimov

.github/workflows/ci.yml

@@ -171,7 +171,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-20.04, ubuntu-22.04, macos-12, macos-13, macos-14 ]
-        shared: [ ON ] # https://github.com/boostorg/stacktrace/issues/169
+        shared: [ OFF, ON ]
 
     runs-on: ${{matrix.os}}
 
@@ -215,7 +215,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-20.04, ubuntu-22.04, macos-12, macos-13, macos-14 ]
-        shared: [ ON ] # https://github.com/boostorg/stacktrace/issues/169
+        shared: [ OFF, ON ]
 
     runs-on: ${{matrix.os}}
 
@@ -275,7 +275,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-20.04, ubuntu-22.04, macos-12, macos-13, macos-14 ]
-        shared: [ ON ] # https://github.com/boostorg/stacktrace/issues/169
+        shared: [ OFF, ON ]
 
     runs-on: ${{matrix.os}}
 
@@ -443,7 +443,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ windows-2019, windows-2022 ]
-        shared: [ ON ] # https://github.com/boostorg/stacktrace/issues/169
+        shared: [ OFF, ON ]
 
     runs-on: ${{matrix.os}}