diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index d9421374613e1a..1d44a5482c0313 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -88,7 +88,7 @@ jobs:
 
       - name: Restore vcpkg artifact
         id: restore-vcpkg
-        uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
         with:
           path: src\vcpkg_installed
           key: windows-${{ matrix.os }}-vcpkg-${{ hashFiles('src/vcpkg.json') }}
@@ -100,7 +100,7 @@ jobs:
         if: ${{ ! steps.restore-vcpkg.outputs.cache-hit }}
 
       - name: Save vcpkg artifact
-        uses: actions/cache/save@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        uses: actions/cache/save@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
         with:
           path: src\vcpkg_installed
           key: windows-${{ matrix.os }}-vcpkg-${{ hashFiles('src/vcpkg.json') }}
diff --git a/include/ruby/internal/intern/string.h b/include/ruby/internal/intern/string.h
index 2ec08fc81f9d13..8bd1ffcfb4a534 100644
--- a/include/ruby/internal/intern/string.h
+++ b/include/ruby/internal/intern/string.h
@@ -412,8 +412,8 @@ VALUE rb_utf8_str_new_static(const char *ptr, long len);
 
 /**
  * Identical to rb_interned_str(),  except it takes a Ruby's  string instead of
- * C's.  It can also be seen  as a routine identical to rb_str_new_shared(),
- * except it returns an infamous "f"string.
+ * C's and preserves its encoding.  It can also be seen  as a routine identical
+ * to rb_str_new_shared(), except it returns an infamous "f"string.
  *
  * @param[in]  str  An object of ::RString.
  * @return     An instance  of ::rb_cString, either cached  or allocated, which
@@ -444,8 +444,9 @@ VALUE rb_str_to_interned_str(VALUE str);
  *                           terminating NUL character.
  * @exception  rb_eArgError  `len` is negative.
  * @return     A  found or  created instance  of ::rb_cString,  of `len`  bytes
- *             length,  of US-ASCII  or "binary"  encoding, whose  contents are
- *             identical to that of `ptr`.
+ *             length,  whose  contents  are  identical  to that of `ptr`.  Its
+ *             encoding  will  be US-ASCII if all bytes are lower ASCII, BINARY
+ *             otherwise.
  * @pre        At  least  `len` bytes  of  continuous  memory region  shall  be
  *             accessible via `ptr`.
  */
@@ -461,8 +462,9 @@ RBIMPL_ATTR_NONNULL(())
  *
  * @param[in]  ptr             A C string.
  * @exception  rb_eNoMemError  Failed to allocate memory.
- * @return     An  instance  of  ::rb_cString,   of  "binary"  encoding,  whose
- *             contents are verbatim copy of `ptr`.
+ * @return     An  instance  of  ::rb_cString, whose contents are verbatim copy
+ *             of `ptr`. Its encoding  will  be US-ASCII if all bytes are lower
+ *             ASCII, BINARY otherwise.
  * @pre        `ptr` must not be a null pointer.
  */
 VALUE rb_interned_str_cstr(const char *ptr);
diff --git a/tool/sync_default_gems.rb b/tool/sync_default_gems.rb
index fb928410a6e960..14d7a3893deae6 100755
--- a/tool/sync_default_gems.rb
+++ b/tool/sync_default_gems.rb
@@ -861,13 +861,10 @@ def update_default_gems(gem, release: false)
       REPOSITORIES.each_key {|gem| update_default_gems(gem)}
     end
   when "all"
-    if ARGV[1] == "release"
-      REPOSITORIES.each_key do |gem|
-        update_default_gems(gem, release: true)
-        sync_default_gems(gem)
-      end
-    else
-      REPOSITORIES.each_key {|gem| sync_default_gems(gem)}
+    REPOSITORIES.each_key do |gem|
+      next if ["Onigmo"].include?(gem)
+      update_default_gems(gem, release: true) if ARGV[1] == "release"
+      sync_default_gems(gem)
     end
   when "list"
     ARGV.shift